MESON Chess Problem Database

Problem Display
PID: 231322 (2nrB3/1p4pp/4Pp2/R2N1k2/5P2/8/4Q3/2BK1R2 w - - 0 1)

Golubev, Giorgi P

64 Shakhmatnoe obozrenie, 1927

2nrB3/1p4pp/4Pp2/R2N1k2/5P2/8/4Q3/2BK1R2

#2

9 + 7

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5+
      • 2.Rxd5#
    • 1...Rxe8
      • 2.Se7#
    • 1...Sd6
      • 2.Se7#
    • 1...g5
      • 2.fxg5#
  • Tries
    • 1.Ke1?
      • threat
        • 2.Se7#
      • 1...Rxd5
        • 2.Rxd5#
      • 1...Se7
        • 2.Sxe7#
      • 1...b5!
    • 1.Kc2?
      • threat
        • 2.Se7#
      • 1...Rxd5
        • 2.Rxd5#
      • 1...Se7
        • 2.Sxe7#
      • 1...b5!
    • 1.Bd2?
      • threat
        • 2.Se7#
      • 1...Rxd5
        • 2.Rxd5#
      • 1...Se7
        • 2.Sxe7#
      • 1...b5!
    • 1.Ba4?
      • threat
        • 2.Bc2#
      • 1...Kg6
        • 2.f5#
      • 1...Sd6
        • 2.Se7#
      • 1...Rxd5+!
    • 1.Bg6+?
      • 1...Kxg6
        • 2.f5#
      • 1...hxg6!
  • Keys
    • 1.Bb5!
      • threat
        • 2.Bd3#
      • 1...Kg6
        • 2.f5#
      • 1...Sd6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(g);CHECK,OGATE,P_SPINR(g),XS(G)::R(F),XR(g)
    • R(g);N_PINS(G),XB(I)::R(F)+S(G),DCHECK
    • S(f);N_PINS(G)::R(F)+S(G),DCHECK
    • P(d);OGATE::R(C)+P(E),XP(d)
  • Tries
    • Try
      • K(B);N_SPINS(G),P-FLIGHT
      • Threat
        • R(F)+S(G),DCHECK
      • Vars
        • R(g);OGATE,P_SPINR(g),XS(G)::R(F),XR(g)
        • S(f);::R(F)+S(G),DCHECK,XS(f)
      • Refutation
        • P(c);
    • Try
      • K(B);N_SPINS(G),S_FLIGHT
      • Threat
        • R(F)+S(G),DCHECK
      • Vars
        • R(g);OGATE,P_SPINR(g),XS(G)::R(F),XR(g)
        • S(f);::R(F)+S(G),DCHECK,XS(f)
      • Refutation
        • P(c);
    • Try
      • B(A);N_SPINS(G)
      • Threat
        • R(F)+S(G),DCHECK
      • Vars
        • R(g);OGATE,P_PINB(A),P_SPINR(g),XS(G)::R(F),XR(g)
        • S(f);::R(F)+S(G),DCHECK,XS(f)
      • Refutation
        • P(c);
    • Try
      • B(I);
      • Threat
        • B(I)
      • Vars
        • K(a);OGATE,S_FLIGHT::P(E)
        • S(f);N_PINS(G)::R(F)+S(G),DCHECK
      • Refutation
        • R(g);CHECK,P_SPINR(g),XS(G)
    • Try
      • B(I);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XB(I)::P(E)
      • Refutation
        • P(e);XB(I)
  • Actual
    • B(I);
    • Threat
      • B(I)
    • Vars
      • K(a);OGATE,S_FLIGHT::P(E)
      • S(f);N_PINS(G)::S(G)
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