MESON Chess Problem Database

Problem Display
PID: 172318 (8/8/5K2/8/4QNpk/7P/8/6n1 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

8/8/5K2/8/4QNpk/7P/8/6n1

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...g3
      • 2.Qh7#
  • Tries
    • 1.Sh5?
      • threat
        • 2.Qxg4#
      • 1...Kxh3
        • 2.Qh1#
      • 1...Kxh5
        • 2.Qh7#
      • 1...Sxh3!
  • Keys
    • 1.Se2!
      • threat
        • 2.Qh7#
        • 2.Qxg4#
      • 1...Kxh3
        • 2.Qh1#
      • 1...Kh5
        • 2.Qh7#
      • 1...Sxe2
        • 2.Qxg4#
      • 1...Sxh3
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(b);SBLOCK::QAR(B)
  • Tries
    • Try
      • S(C);P_PINP(b)
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(c);N_SPINP(b),OGATEB,P-FLIGHT,XP(A)::QAR2(B)
        • K(c);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR2(B)
      • Refutation
        • S(a);XP(A)
  • Actual
    • S(C);P_PINP(b)
    • Threat
      • DUALS(2)
    • Vars
      • K(c);N_SPINP(b),OGATEB,P-FLIGHT,XP(A)::QAR2(B)
      • K(c);N_SPINP(b),P-FLIGHT::QAR2(B)
      • S(a);XS(C)::QAR1(B),XP(b)
      • S(a);SBLOCK,XP(A)::QAR(B)
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