MESON Chess Problem Database

Problem Display
PID: 246408 (2r5/8/3P1Q1p/2R2p1p/4PrP1/2P2k2/5N1B/2KN1B2 w - - 0 1)

Kopyl, Valery Volodimirovich

Shakhmatnaya Poeziya, 2010

2r5/8/3P1Q1p/2R2p1p/4PrP1/2P2k2/5N1B/2KN1B2

#2

11 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...fxe4
      • 2.Qxf4#
    • 1...fxg4
      • 2.Qxf4#
  • Tries
    • 1.Rd5?
      • threat
        • 2.Rd3#
      • 1...Rxc3+
        • 2.Qxc3#
      • 1...fxe4
        • 2.Qxf4#
      • 1...Rxe4!
    • 1.Qd4?
      • threat
        • 2.Qe3#
        • 2.Qd3#
      • 1...fxe4
        • 2.Qe3#
      • 1...Rxe4!
    • 1.Qh4?
      • threat
        • 2.Qg3#
        • 2.Qh3#
      • 1...fxg4
        • 2.Qg3#
      • 1...hxg4
        • 2.Qg3#
      • 1...Rxg4!
    • 1.Qe5?
      • threat
        • 2.Qxf4#
      • 1...Rxe4
        • 2.Qg3#
      • 1...Rxg4!
    • 1.Qxf5?
      • threat
        • 2.Qxf4#
      • 1...Rxf5
        • 2.Rxf5#
      • 1...Rf8!
    • 1.Qxh6?
      • threat
        • 2.Qxf4#
      • 1...Rxg4
        • 2.Qe3#
      • 1...Rxe4!
    • 1.c4?
      • threat
        • 2.Qc3#
      • 1...fxe4
        • 2.Qxf4#
      • 1...Rxe4!
  • Keys
    • 1.Rxf5!
      • threat
        • 2.Rxf4#
      • 1...Rxc3+
        • 2.Qxc3#
      • 1...Rxf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(c);OGATE,P_SPINR(b),XP(G)::QAR1(K),XR(b)
    • P(c);OGATE,P_SPINR(b),XP(H)::QAR1(K),XR(b)
  • Tries
    • Try
      • R(I);P_SPINP(F)
      • Threat
        • R(I)
      • Vars
        • R(f);CHECK,OGATE,XP(F)::QAR(K),XR(f)
        • P(c);OGATE,P_SPINR(b),XP(G)::QAR1(K),XR(b)
      • Refutation
        • R(b);P_SPINP(c),XP(G)
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XP(G)::QAR1(K)
      • Refutation
        • R(b);XP(G)
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XP(H)::QAR1(K)
        • P(d);XP(H)::QAR1(K)
      • Refutation
        • R(b);XP(H)
    • Try
      • Q(K);
      • Threat
        • QAR1(K),XR(b)
      • Vars
        • R(b);OGATE,XP(G)::QAR1(K)
      • Refutation
        • R(b);XP(H)
    • Try
      • Q(K);P_PINR(b),XP(c)
      • Threat
        • QAR1(K),XR(b)
      • Vars
        • R(b);N_SPINR(b),OGATE,XQ(K)::R(I),XR(b)
      • Refutation
        • R(f);
    • Try
      • Q(K);XP(e)
      • Threat
        • QAR1(K),XR(b)
      • Vars
        • R(b);OGATE,XP(H)::QAR1(K)
      • Refutation
        • R(b);XP(G)
    • Try
      • P(F);
      • Threat
        • QAR(K)
      • Vars
        • P(c);OGATE,P_SPINR(b),XP(G)::QAR1(K),XR(b)
      • Refutation
        • R(b);P_SPINP(c),XP(G)
  • Actual
    • R(I);P_PINR(b),P_SPINP(F),XP(c)
    • Threat
      • R1(I),XR(b)
    • Vars
      • R(f);CHECK,OGATE,XP(F)::QAR(K),XR(f)
      • R(b);OGATE,XR(I)::QAR2(K),XR(b)
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