MESON Chess Problem Database

Problem Display
PID: 74784 (1Q6/3NKB2/2pP4/1b2P3/Rbnk4/1P1ppP1p/NR2r1p1/B5r1 w - - 0 1)

Gamage, Frederick

3rd Prize, Chess Problem, 1945

1Q6/3NKB2/2pP4/1b2P3/Rbnk4/1P1ppP1p/NR2r1p1/B5r1

#2

12 + 11

5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Rd2#
    • 1...Bxd6+
      • 2.Qxd6#
    • 1...Sd2
      • 2.Rb1#
    • 1...Sxd6
      • 2.Qxd6#
    • 1...d2
      • 2.Rxd2#
  • Tries
    • 1.Rc2+?
      • 1...Bc3
        • 2.Bxc3#
      • 1...Sb2
        • 2.Bxb2#
      • 1...Rxa1!
    • 1.Rd2+?
      • 1...Bc3
        • 2.Bxc3#
      • 1...Sb2
        • 2.Bxb2#
      • 1...Rxa1!
    • 1.Rxe2+?
      • 1...Bc3
        • 2.Bxc3#
      • 1...Sb2
        • 2.Bxb2#
      • 1...Rxa1!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qh4#
      • 1...Bxd6+
        • 2.exd6#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Sxd6
        • 2.exd6#
      • 1...d2
        • 2.Rxd2#
      • 1...Be1
        • 2.Rd2#
      • 1...Sd2
        • 2.Rb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(g);N_GUARD,N_PINP(H),P_SPINS(h),S_CUTR(a)::B(A)+R(C)
    • B(g);CHECK,OGATE,P_SPINS(h),XP(H)::QAR2(L),XB(g)
    • S(h);N_GUARD,P_SPINB(g),S_CUTR(b)::B(A)+R(C)
    • S(h);OGATE,P_SPINB(g),XP(H)::QAR2(L),XS(h)
    • P(d);::B(A)+R(C),DCHECK,XP(d)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • B(g);N_GUARD,N_PINP(H),P_SPINB(g),P_SPINS(h)::B(A),XB(g)
        • S(h);N_GUARD,P_SPINB(g),P_SPINS(h)::B(A),XS(h)
      • Refutation
        • R(a);XB(A)
    • Try
      • R(C);CHECK,P_PINP(d)
      • Vars
        • B(g);N_GUARD,N_PINP(H),P_SPINB(g),P_SPINS(h)::B(A),XB(g)
        • S(h);N_GUARD,P_SPINB(g),P_SPINS(h)::B(A),XS(h)
      • Refutation
        • R(a);XB(A)
    • Try
      • R(C);CHECK,XR(b)
      • Vars
        • B(g);N_GUARD,N_PINP(H),P_SPINB(g),P_SPINS(h)::B(A),XB(g)
        • S(h);N_GUARD,P_SPINB(g),P_SPINS(h)::B(A),XS(h)
      • Refutation
        • R(a);XB(A)
  • Actual
    • Q(L);
    • Threat
      • QAR(L)
    • Vars
      • B(g);CHECK,OGATE,P_SPINS(h),XP(H)::QAB(L)+P(G),XB(g)
      • S(h);OGATE,P_SPINB(g),P_SPINS(h),XP(G)::QAB1(L),XS(h)
      • S(h);OGATE,P_SPINB(g),XP(H)::QAB(L)+P(G),XS(h)
      • P(d);::B(A)+R(C),DCHECK,XP(d)
      • B(g);N_GUARD,N_PINP(H),P_SPINS(h),S_CUTR(a)::B(A)+R(C)
      • S(h);N_GUARD,P_SPINB(g),S_CUTR(b)::B(A)+R(C)
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