MESON Chess Problem Database

Problem Display
PID: 244496 (8/7Q/8/3PNP2/R2PrP1R/1p2k2P/4P3/4K3 w - - 0 1)

Fomichev, Evgeny Vasilevich

Rochade Europa, 2005

8/7Q/8/3PNP2/R2PrP1R/1p2k2P/4P3/4K3

#2

11 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qh6?
      • threat
        • 2.Sg4#
      • 1...Rxf4
        • 2.Qxf4#
      • 1...Rxe5
        • 2.fxe5#
      • 1...Rxd4!
    • 1.Qa7?
      • threat
        • 2.Sc4#
      • 1...Rxd4
        • 2.Qxd4#
      • 1...Rxe5
        • 2.dxe5#
      • 1...Rxf4!
  • Keys
    • 1.Qe7!
      • 1...Rxd4
        • 2.Sc4#
      • 1...Rxf4
        • 2.Sg4#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...b2
        • 2.Qa3#

Anticipated by 103491(1985)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(K);
      • Threat
        • S(I)
      • Vars
        • R(c);OGATE,P_SPINR(c),XP(F)::QAB1(K),XR(c)
        • R(c);OGATE,XS(I)::QAB(K)+P(F),XR(c)
      • Refutation
        • R(c);XP(E)
    • Try
      • Q(K);
      • Threat
        • S(I)
      • Vars
        • R(c);OGATE,P_SPINR(c),XP(E)::QAB1(K),XR(c)
        • R(c);OGATE,XS(I)::QAB(K)+P(E),XR(c)
      • Refutation
        • R(c);XP(F)
  • Actual
    • Q(K);
    • Vars
      • R(c);SBLOCK,XP(E)::QAR(K)+S(I),DCHECK
      • R(c);SBLOCK,XP(F)::QAR(K)+S(I),DCHECK
      • R(c);OGATE,P_SPINR(c),XS(I)::QAR2(K),XR(c)
      • P(a);OGATEB::QAR(K)
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