[Retros] 1462 last moves

Olli Heimo olli.heimo at luukku.com
Mon Jan 21 07:47:09 EST 2019

Hi! Last year i tried for records of maximum white moves to mate or stalemate just to see that those tries were badly anticipiated. I promised to try the record for duplex-retromoves. I found in PDB P0006825 by Cross & Fielder from year 1973 with 1459 duplex-retromoves. I have now constructed http://www.janko.at/Retros/d.php?ff=K1Q1QRQB/bQ6/3Q3q/Q6Q/q6q/3q3Q/Bq6/k1q1q1qb. I count 1462 moves. In fen-order from a8 to h1: White 3+65+69+44+69+30+102+120+78+72+60+36=748 and Black 36+54+78+72+126+102+3+65+74+74+30=714. Some moves like Qa6xBb7 may look strange but should be legal. I will not be surprised if I hear that during past 46 years the record has already been broken or will soon be bettered after my work. Olli.

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