MESON Chess Problem Database

Problem Display
PID: 75597 (1b1Rb3/n3B2K/3r2p1/3n4/R1Pk4/1PNN2p1/1P5p/2Q2B1q w - - 0 1)

Gamage, Frederick

Hassberg, Eric Manfred

1st Prize, Christian Science Monitor, 1947

1b1Rb3/n3B2K/3r2p1/3n4/R1Pk4/1PNN2p1/1P5p/2Q2B1q

#2

11 + 10

5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Bc5#
    • 1...Rb6
      • 2.Bc5#
    • 1...Rc6
      • 2.c5#
    • 1...Re6
      • 2.Bc5#
    • 1...Rf6
      • 2.Bc5#
    • 1...Rd7
      • 2.cxd5#
    • 1...Rxd8
      • 2.Bc5#
    • 1...Bf7
      • 2.cxd5#
    • 1...Se3
      • 2.Bf6#
    • 1...Sb4
      • 2.Bf6#
    • 1...Sf4
      • 2.Bf6#
    • 1...Sb6
      • 2.Bf6#
    • 1...Sf6+
      • 2.Bxf6#
    • 1...Sc7
      • 2.Bf6#
    • 1...Sb5
      • 2.cxd5#
  • Tries
    • 1.Qe3+?
      • 1...Sxe3
        • 2.Bf6#
      • 1...Kxe3!
    • 1.Qf4+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Sxf4!
    • 1.c5+?
      • 1...Sb4
        • 2.Bf6#
        • 2.Rxb4#
      • 1...Bxa4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qe5#
      • 1...Sf6+
        • 2.Bxf6#
      • 1...Qxf1
        • 2.Qe4#
      • 1...Rxd8
        • 2.Bc5#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Ra6
        • 2.Bc5#
      • 1...Rb6
        • 2.Bc5#
      • 1...Rc6
        • 2.c5#
      • 1...Re6
        • 2.Bc5#
      • 1...Rf6
        • 2.Bc5#
      • 1...Rd7
        • 2.cxd5#
      • 1...Se3
        • 2.Bf6#
      • 1...Sc6
        • 2.Sb5#

This is a version of 17497

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(f);OGATE,P_SPINS(e)::B(I)
    • R(f);P_SPINS(e),S_CUTB(j)::R(G)+P(H)
    • R(f);P_PINB(I),S_CUTB(j)::R(G)+P(H),XS(e)
    • R(f);OGATE,XR(K)::B(I)
    • B(j);N_GUARD::R(G)+P(H),XS(e)
    • S(e);N_GUARD,P_SPINR(f)::B(I)
    • S(e);CHECK,N_GUARD,P_SPINR(f)::B(I),XS(e)
    • S(h);S_CUTB(j)::R(G)+P(H),XS(e)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);P_SPINR(f),SBLOCK,XQ(A)::B(I)
      • Refutation
        • K(d);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAR1(A),XQ(a)
      • Refutation
        • S(e);P_SPINR(f),XQ(A)
    • Try
      • P(H);CHECK
      • Refutation
        • B(j);XR(G)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • S(e);CHECK,N_GUARD,P_SPINR(f)::B(I),XS(e)
      • Q(a);N_GUARD,XB(B)::QAR1(A)
      • R(f);OGATE,XR(K)::B(I)
      • Q(a);N_GUARD::QAR1(A),XQ(a)
      • R(f);OGATE,P_SPINS(e)::B(I)
      • R(f);P_SPINS(e),S_CUTB(j)::R(G)+P(H)
      • R(f);P_PINB(I),S_CUTB(j)::R(G)+P(H),XS(e)
      • S(e);N_GUARD,P_SPINR(f)::B(I)
      • S(h);N_GUARD,S_CUTB(j)::S(E)
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