MESON Chess Problem Database

Problem Display
PID: 180331 (Q5bk/4K2N/4P1P1/5N2/8/8/1P6/8 w - - 0 1)

Lider, Valentin Viktorovich

2nd HM., Magyar Sakkelet, 1971

Q5bk/4K2N/4P1P1/5N2/8/8/1P6/8

#2

7 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Kf8?
      • 1...Bxh7
        • 2.g7#
      • 1...Bf7
        • 2.Kxf7#
      • 1...Bxe6!
    • 1.Sf8?
      • threat
        • 2.g7#
      • 1...Bxe6
        • 2.Sxe6#
      • 1...Bh7
        • 2.Sxh7#
      • 1...Bf7!
  • Keys
    • 1.Qh1!
      • threat
        • 2.g7#
      • 1...Bxe6
        • 2.Sf6#
      • 1...Bxh7
        • 2.Qxh7#
      • 1...Bf7
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);N_PINB(a),S_FLIGHT
      • Vars
        • B(a);SBLOCK,XS(F)::P(D)
        • B(a);::QAR(G)+K(E),XB(a)
      • Refutation
        • B(a);XP(C)
    • Try
      • S(F);N_PINB(a)
      • Threat
        • P(D)
      • Vars
        • B(a);XP(C)::QAR(G)+S(F),XB(a)
        • B(a);::QAR(G)+S(F),XB(a)
      • Refutation
        • B(a);
  • Actual
    • Q(G);N_PINB(a)
    • Threat
      • P(D)
    • Vars
      • B(a);N_GUARD,XP(C)::QAR(G)+S(F)
      • B(a);OGATE,P_SPINB(a),XS(F)::QAR1(G),XB(a)
      • B(a);N_GUARD::QAR(G)+S(F)
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