MESON Chess Problem Database

Problem Display
PID: 252111 (8/2p5/Qp2pK1p/1Br1N1P1/1Nb1kPrR/3RppP1/8/8 w - - 0 1)

Ryabtsev, Volodimir Grigorovich

Zadachi i Etyudi, 2004

8/2p5/Qp2pK1p/1Br1N1P1/1Nb1kPrR/3RppP1/8/8

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf4+
      • 2.Rxf4#
    • 1...Rxg5
      • 2.fxg5#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Rd4#
      • 1...Rxf4+
        • 2.Rxf4#
      • 1...Rd5
        • 2.Rxe3#
      • 1...Bxd3!
    • 1.Qa1?
      • threat
        • 2.Rd4#
        • 2.Qd4#
      • 1...Rxf4+
        • 2.Rxf4#
      • 1...Bxd3
        • 2.Bxd3#
      • 1...e2
        • 2.Qd4#
      • 1...Rd5!
  • Keys
    • 1.Be8!
      • threat
        • 2.Bg6#
      • 1...Rxf4+
        • 2.Rxf4#
      • 1...Rxg5
        • 2.fxg5#
      • 1...Rxe5
        • 2.Qxc4#
      • 1...Bxd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,OGATE,P_SPINR(e),XP(D)::R1(E),XR(e)
    • R(e);OGATE,XP(H)::R(E)+P(D),XR(e)
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(A)
      • Vars
        • R(e);CHECK,OGATE,P_SPINR(e),XP(D)::R1(E),XR(e)
        • R(f);SBLOCK::R1(A),XP(a)
      • Refutation
        • B(c);XR(A)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);CHECK,OGATE,P_SPINR(e),XP(D)::R1(E),XR(e)
        • B(c);OGATE,XR(A)::B(F),XB(c)
        • P(a);::QAR1(I)
      • Refutation
        • R(f);
  • Actual
    • B(F);
    • Threat
      • B(F)
    • Vars
      • R(e);CHECK,OGATE,P_SPINR(e),XP(D)::R1(E),XR(e)
      • R(e);OGATE,XP(H)::R(E)+P(D),XR(e)
      • R(f);N_GUARD,XS(G)::QAR2(I),XB(c)
      • B(c);OGATE,XR(A)::QAB1(I),XB(c)
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