MESON Chess Problem Database

Problem Display
PID: 250085 (K2Nr3/Npp1P3/n1P3n1/1P2p3/1B1kB3/2pP4/1QpP4/q7 w - - 0 1)

Hume, George

Chess Amateur (The), 1927

K2Nr3/Npp1P3/n1P3n1/1P2p3/1B1kB3/2pP4/1QpP4/q7

#2

11 + 10

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qxc3#
    • 1...Qc1
      • 2.Qxc3#
    • 1...Qd1
      • 2.Qxc3#
    • 1...Qe1
      • 2.Qxc3#
    • 1...Qf1
      • 2.Qxc3#
    • 1...Qg1
      • 2.Qxc3#
    • 1...Qh1
      • 2.Qxc3#
    • 1...Qa2
      • 2.Qxc3#
    • 1...Qa4
      • 2.Qxc3#
    • 1...Qa5
      • 2.Qxc3#
    • 1...Rxd8+
      • 2.exd8Q#
      • 2.exd8R#
    • 1...Sxb4
      • 2.Qxb4#
    • 1...Sc5
      • 2.Bxc3#
    • 1...Sb8
      • 2.Se6#
    • 1...bxc6
      • 2.Sxc6#
  • Tries
    • 1.Bc5+?
      • 1...Sxc5
        • 2.Qb4#
      • 1...Kxc5!
    • 1.Qb3?
      • threat
        • 2.Qc4#
        • 2.Qd5#
      • 1...Rxd8+
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Sxb4
        • 2.Qc4#
        • 2.Qxb4#
      • 1...Sxe7
        • 2.Qc4#
      • 1...bxc6
        • 2.Sxc6#
        • 2.Qc4#
      • 1...Qa2
        • 2.Qxc3#
      • 1...Sf4
        • 2.Qc4#
      • 1...cxd2!
    • 1.bxa6?
      • threat
        • 2.Sb5#
      • 1...Rxd8+
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Qxa6
        • 2.Qxc3#
      • 1...bxc6
        • 2.Sxc6#
      • 1...Qa4
        • 2.Qxc3#
      • 1...Qa5
        • 2.Qxc3#
      • 1...b5
        • 2.Sxb5#
      • 1...bxa6!
    • 1.cxb7?
      • threat
        • 2.Sc6#
      • 1...Rxd8+
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Sxb4
        • 2.Qxb4#
      • 1...Sc5
        • 2.Bxc3#
      • 1...Sb8
        • 2.Se6#
      • 1...c6
        • 2.Sxc6#
      • 1...Sxe7!
  • Keys
    • 1.b6!
      • threat
        • 2.Sb5#
      • 1...Rxd8+
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Sxb4
        • 2.Qxb4#
      • 1...bxc6
        • 2.Sxc6#
      • 1...Qa4
        • 2.Qxc3#
      • 1...Qa5
        • 2.Qxc3#
      • 1...Sc5
        • 2.Bxc3#
      • 1...Sb8
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::QAB1(A),XP(c)
    • R(j);CHECK,OGATE,XS(K)::PXR(j)=Q
    • S(f);N_PINS(K),OGATE,P_PINS(H),XB(D)::QAR2(A),XS(f)
    • S(f);N_PINS(K),P_PINS(H),SBLOCK::B(D),XP(c)
    • S(f);N_PINS(K),P_PINS(H)::S(K)
    • P(h);XP(G)::S(H),XP(h)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • S(f);N_PINS(K),P_PINS(H),XB(D)::QAR2(A)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT,XB(D)
    • Try
      • Q(A);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(j);CHECK,OGATE,XS(K)::PXR(j)=Q
        • S(g);XP(I)::QAR1(A)
        • Q(a);N_GUARD::QAB1(A),XP(c)
        • S(g);::QAR1(A)
      • Refutation
        • P(c);XP(B)
    • Try
      • P(F);XS(f)
      • Threat
        • S(H)
      • Vars
        • R(j);CHECK,OGATE,XS(K)::PXR(j)=Q
        • Q(a);N_GUARD,N_PINS(K),P_PINS(H),XP(F)::QAB1(A),XP(c)
        • P(h);XP(G)::S(H),XP(h)
        • Q(a);N_GUARD::QAB1(A),XP(c)
        • P(h);::S(H),XP(h)
      • Refutation
        • P(h);XP(F)
    • Try
      • P(G);XP(h)
      • Threat
        • S(H)
      • Vars
        • R(j);CHECK,OGATE,XS(K)::PXR(j)=Q
        • S(f);N_PINS(K),OGATE,P_PINS(H),XB(D)::QAR2(A),XS(f)
        • S(f);N_PINS(K),P_PINS(H),SBLOCK::B(D),XP(c)
        • S(f);N_PINS(K),P_PINS(H)::S(K)
        • P(i);::S(H),XP(i)
      • Refutation
        • S(g);XP(I)
  • Actual
    • P(F);
    • Threat
      • S(H)
    • Vars
      • R(j);CHECK,OGATE,XS(K)::PXR(j)=Q
      • S(f);N_PINS(K),OGATE,P_PINS(H),XB(D)::QAR2(A),XS(f)
      • P(h);XP(G)::S(H),XP(h)
      • Q(a);N_GUARD::QAB1(A),XP(c)
      • S(f);N_PINS(K),P_PINS(H),SBLOCK::B(D),XP(c)
      • S(f);N_PINS(K),P_PINS(H)::S(K)
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