MESON Chess Problem Database

Problem Display
PID: 7730 (8/7Q/2PNP1P1/R1PrP2R/2pk1p2/2p2K2/2P5/8 w - - 0 1)

Tkachenko, Sergiy Ivanovich

idee & form, 1993

8/7Q/2PNP1P1/R1PrP2R/2pk1p2/2p2K2/2P5/8

#2

11 + 5

5454 Near Snap 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Qa7?
      • threat
        • 2.Sb5#
      • 1...Rxc5
        • 2.Qxc5#
      • 1...Rxd6
        • 2.cxd6#
      • 1...Rxe5!
    • 1.Qg7?
      • threat
        • 2.Sf5#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Rxd6
        • 2.exd6#
      • 1...Rxc5!
    • 1.Qh8?
      • threat
        • 2.Sf5#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Rxd6
        • 2.exd6#
      • 1...Rxc5!
  • Keys
    • 1.Qd7!
      • 1...Rxc5
        • 2.Sb5#
      • 1...Rxe5
        • 2.Sf5#
      • 1...Rxd6
        • 2.Qxd6#

Anticipated by 103491(1985)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(K);
      • Threat
        • S(H)
      • Vars
        • R(e);OGATE,P_SPINR(e),XP(D)::QAB1(K),XR(e)
        • R(e);OGATE,XS(H)::QAB(K)+P(D),XR(e)
      • Refutation
        • R(e);XP(E)
    • Try
      • Q(K);
      • Threat
        • S(H)
      • Vars
        • R(e);OGATE,P_SPINR(e),XP(E)::QAB1(K),XR(e)
        • R(e);OGATE,XS(H)::QAB(K)+P(E),XR(e)
      • Refutation
        • R(e);XP(D)
    • Try
      • Q(K);
      • Threat
        • S(H)
      • Vars
        • R(e);OGATE,P_SPINR(e),XP(E)::QAB1(K),XR(e)
        • R(e);OGATE,XS(H)::QAB(K)+P(E),XR(e)
      • Refutation
        • R(e);XP(D)
  • Actual
    • Q(K);
    • Vars
      • R(e);SBLOCK,XP(D)::QAR(K)+S(H),DCHECK
      • R(e);SBLOCK,XP(E)::QAR(K)+S(H),DCHECK
      • R(e);OGATE,P_SPINR(e),XS(H)::QAR2(K),XR(e)
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