MESON Chess Problem Database

Problem Display
PID: 11464 (3b4/p1N1p3/1k3q1R/pN4Q1/p3B3/P2p2p1/5rn1/1R1K2B1 w - - 0 1)

Gamage, Frederick

3rd Prize, CCLA (Open Ty.), 1939

3b4/p1N1p3/1k3q1R/pN4Q1/p3B3/P2p2p1/5rn1/1R1K2B1

#2

9 + 11

5088 How to Solve Chess Problems 1945
5064 100 Years of the American Two-move Chess Problem 1962
5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Rxe6#
    • 1...Se1
      • 2.Qe3#
    • 1...Se3+
      • 2.Qxe3#
    • 1...Sh4
      • 2.Qe3#
    • 1...a6
      • 2.Sa8#
  • Tries
    • 1.Sxa7+?
      • 1...Kxa7
        • 2.Rb7#
      • 1...Kxc7!
    • 1.Bxf2+?
      • 1...Se3+
        • 2.Bxe3#
        • 2.Qxe3#
      • 1...gxf2!
    • 1.Rxf6+?
      • 1...e6
        • 2.Rxe6#
      • 1...exf6!
    • 1.Qxf6+?
      • 1...Kc5
        • 2.Rc1#
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qc6#
      • 1...e6
        • 2.Qd4#
      • 1...exf6!
    • 1.Qe5?
      • threat
        • 2.Sc3#
        • 2.Qd4#
      • 1...Bxc7
        • 2.Sxc7#
      • 1...Qc6
        • 2.Sc3#
      • 1...Qd6
        • 2.Qd4#
      • 1...a6
        • 2.Sa8#
        • 2.Qd4#
      • 1...e6
        • 2.Sc3#
        • 2.Qd6#
      • 1...Se3+!
  • Keys
    • 1.Qc1!
      • 1...Se3+
        • 2.Qxe3#
      • 1...Qxh6
        • 2.Sd6#
      • 1...Bxc7
        • 2.Sxc7#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qd6
        • 2.Sxd6#
      • 1...Qe6
        • 2.Rxe6#
      • 1...Qg6
        • 2.Sd6#
      • 1...Se1
        • 2.Qe3#
      • 1...Sf4
        • 2.Qe3#
      • 1...Sh4
        • 2.Qe3#
      • 1...d2
        • 2.Sd4#
      • 1...a6
        • 2.Sa8#
      • 1...e5
        • 2.Sd6#
      • 1...e6
        • 2.Qc6#

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • Q(h);OGATE::R(H),XQ(h)
    • S(b);N_GUARD::QAB(G)
    • S(b);CHECK,N_GUARD,N_SPINR(a)::QAB(G),XS(b)
    • P(i);SBLOCK::S(I)
  • Tries
    • Try
      • S(F);CHECK,XP(i)
      • Vars
        • K(g);N_SPINQ(h),OGATE,S_FLIGHT,XS(F)::R1(A)
      • Refutation
        • K(g);N_SPINQ(h),N_SPINR(a),S_FLIGHT,XS(I)
    • Try
      • B(C);CHECK,XR(a)
      • Refutation
        • P(d);XB(C)
    • Try
      • R(H);CHECK,XQ(h)
      • Vars
        • P(j);P_SPINP(j)::R(H),XP(j)
      • Refutation
        • P(j);XR(H)
    • Try
      • Q(G);CHECK,XQ(h)
      • Vars
        • P(j);P_SPINP(j)::QAB(G)
      • Refutation
        • P(j);P_SPINP(j),XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(k);XS(I)::R(A)+S(F),XB(k)
        • Q(h);::R(A)+S(F)
        • Q(h);::QAB(G)
      • Refutation
        • S(b);CHECK,N_SPINR(a)
  • Actual
    • Q(G);
    • Vars
      • S(b);CHECK,N_GUARD,N_SPINR(a)::QAB(G),XS(b)
      • Q(h);N_GUARD,N_SPINQ(h),XR(H)::R(A)+S(F)
      • B(k);XS(I)::R(A)+S(F),XB(k)
      • Q(h);N_GUARD::QAR1(G),XQ(h)
      • Q(h);N_GUARD::R(A)+S(F),XQ(h)
      • Q(h);OGATE::R(H),XQ(h)
      • Q(h);N_GUARD::R(A)+S(F)
      • S(b);N_GUARD::QAB(G)
      • P(c);::R(A)+S(F)
      • P(i);SBLOCK::S(I)
      • P(j);::R(A)+S(F)
      • P(j);N_SPINQ(h),S_CUTQ(h)::QAR1(G)
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