MESON Chess Problem Database

Problem Display
PID: 161592 (4R3/4rPbK/1p1PPk1p/6rR/P2N1P2/p7/QNB5/B7 w - - 0 1)

Stanley, Cyril (Kipping, Cyril Stanley)

Chess, 1956

4R3/4rPbK/1p1PPk1p/6rR/P2N1P2/p7/QNB5/B7

#2

13 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Rf5#
    • 1...Rg2
      • 2.Rf5#
    • 1...Rg3
      • 2.Rf5#
    • 1...Rg4
      • 2.Rf5#
    • 1...Re5
      • 2.fxe5#
    • 1...Rf5
      • 2.Rxf5#
    • 1...Rg6
      • 2.Rf5#
    • 1...Rxe6
      • 2.Qxe6#
    • 1...Rxe8
      • 2.fxe8S#
  • Tries
    • 1.Rxg5?
      • threat
        • 2.Rf5#
        • 2.Rg6#
      • 1...Rxe6
        • 2.Rf5#
        • 2.Qxe6#
      • 1...hxg5!
    • 1.Rxh6+?
      • 1...Rg6
        • 2.Rxg6#
      • 1...Bxh6!
    • 1.f8Q+?
      • 1...Rf7
        • 2.Qxf7#
      • 1...Bxf8+!
    • 1.f8R+?
      • 1...Rf7
        • 2.Rxf7#
      • 1...Bxf8+!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sd1#
      • 1...Rxf5
        • 2.Rxf5#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...axb2
        • 2.Bxb2#
      • 1...Rg3
        • 2.Sd3#
      • 1...Rc7
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);OGATE::R1(H)
    • R(b);OGATE::P(G),XR(b)
    • R(b);OGATE::R1(H),XR(b)
    • R(f);OGATE,XP(J)::QAR1(B),XR(f)
    • R(f);OGATE,XR(M)::PXR(f)=S
  • Tries
    • Try
      • R(H);XR(b)
      • Threat
        • DUALS(2)
      • Refutation
        • P(e);XR(H)
    • Try
      • R(H);CHECK,XP(e)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::R1(H),XR(b)
      • Refutation
        • B(g);P_PINP(K),XR(H)
    • Try
      • P(K);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAR1(K),XR(f)
      • Refutation
        • B(g);CHECK,XQ(K)
    • Try
      • P(K);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::R1(K),XR(f)
      • Refutation
        • B(g);CHECK,XR(K)
  • Actual
    • S(F);
    • Threat
      • B(A)+S(C)
    • Vars
      • R(b);OGATE,XS(F)::R1(H),XR(b)
      • R(f);OGATE,XP(J)::QAR1(B),XR(f)
      • P(a);OGATE,P_SPINP(a),XS(C)::B(A),XP(a)
      • R(b);::B(A)+S(C)
      • R(f);::B(A)+S(C)
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