MESON Chess Problem Database

Problem Display
PID: 11328 (3b4/3Q4/2p3n1/2p1P1rN/2P1kB2/r2pP3/4R3/1BKNnR2 w - - 0 1)

Cross, H Holgate

Chess, 1938

3b4/3Q4/2p3n1/2p1P1rN/2P1kB2/r2pP3/4R3/1BKNnR2

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sc3#
    • 1...Ra2
      • 2.Sc3#
    • 1...Rc3+
      • 2.Sxc3#
    • 1...Ra4
      • 2.Sc3#
    • 1...Ra5
      • 2.Sc3#
    • 1...Ra6
      • 2.Sc3#
    • 1...Ra7
      • 2.Sc3#
    • 1...Ra8
      • 2.Sc3#
    • 1...Rg3
      • 2.Sxg3#
    • 1...Rxe5
      • 2.Sg3#
    • 1...Rf5
      • 2.Sg3#
      • 2.Qxc6#
    • 1...Ba5
      • 2.Sf6#
    • 1...Bb6
      • 2.Sf6#
    • 1...Bf6
      • 2.Sxf6#
    • 1...Bc7
      • 2.Sf6#
    • 1...Sf3
      • 2.Sf2#
    • 1...Sxf4
      • 2.exf4#
    • 1...Se7
      • 2.Sf6#
  • Tries
    • 1.Bg3?
      • threat
        • 2.Qxc6#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Rxg3
        • 2.Qf5#
      • 1...Sxe5
        • 2.Rf4#
      • 1...Sf4
        • 2.exf4#
      • 1...Ra6
        • 2.Sc3#
      • 1...Sf3
        • 2.Sf2#
      • 1...Se7
        • 2.Sf6#
      • 1...Rxe5!
    • 1.Qg4?
      • threat
        • 2.Sf2#
        • 2.Sg3#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Rxh5
        • 2.Sf2#
      • 1...Sxf4
        • 2.Qxf4#
      • 1...Rxg4!
    • 1.Qf5+?
      • 1...Rxf5
        • 2.Sg3#
      • 1...Kxf5!
  • Keys
    • 1.Bh2!
      • threat
        • 2.Qxc6#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Rxe5
        • 2.Sg3#
      • 1...Sxe5
        • 2.Rf4#
      • 1...Rg3
        • 2.Qf5#
      • 1...Sf4
        • 2.exf4#
      • 1...Ra6
        • 2.Sc3#
      • 1...Sf3
        • 2.Sf2#
      • 1...Se7
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • R(b);N_GUARD,P_PINB(A)::S(C)
    • R(b);N_GUARD::S(C)
    • R(b);CHECK,N_GUARD::S(C),XR(b)
    • R(f);N_GUARD::S(J),XR(f)
    • R(f);N_GUARD,XP(I)::S(J)
    • B(i);N_GUARD::S(J)
    • B(i);N_GUARD::S(J),XB(i)
    • S(a);SBLOCK::S(C)
    • S(h);OGATE,XB(H)::R(E)+P(F),XS(h)
    • S(h);S_CUTB(i)::S(J)
  • Tries
    • Try
      • B(H);
      • Threat
        • QAB(K),XP(g)
      • Vars
        • R(b);CHECK,N_GUARD::S(C),XR(b)
        • R(f);N_GUARD,XB(H)::QAB1(K)
        • S(h);N_GUARD,SBLOCK,XP(I)::R1(D)
        • S(h);OGATE::R(E)+P(F),XS(h)
        • R(b);N_GUARD::S(C)
        • S(a);SBLOCK::S(C)
        • S(h);S_CUTB(i)::S(J)
      • Refutation
        • R(f);XP(I)
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,N_GUARD::S(C),XR(b)
        • R(f);XS(J)::S(C)
        • S(h);OGATE,P_SPINS(h),XB(H)::QAR1(K),XS(h)
      • Refutation
        • R(f);XQ(K)
    • Try
      • Q(K);CHECK
      • Vars
        • R(f);XQ(K)::S(J)
      • Refutation
        • K(d);S_FLIGHT,XQ(K)
  • Actual
    • B(H);
    • Threat
      • QAB(K),XP(g)
    • Vars
      • R(b);CHECK,N_GUARD::S(C),XR(b)
      • R(f);N_GUARD,SBLOCK,XP(I)::S(J)
      • S(h);N_GUARD,SBLOCK,XP(I)::R1(D)
      • R(f);N_GUARD::QAB1(K)
      • S(h);OGATE::R(E)+P(F),XS(h)
      • R(b);N_GUARD::S(C)
      • S(a);SBLOCK::S(C)
      • S(h);S_CUTB(i)::S(J)
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