MESON Chess Problem Database

Problem Display
PID: 12106 (2n1K3/2rP1Q1b/2p1B3/1N2p1p1/pR1PkN1q/7p/3P2P1/b2n1R2 w - - 0 1)

Chandler, Guy Wills

7th HM.=, The Problemist, 1974

2n1K3/2rP1Q1b/2p1B3/1N2p1p1/pR1PkN1q/7p/3P2P1/b2n1R2

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qxh7#
    • 1...Qg3
      • 2.Qxh7#
    • 1...Bf5
      • 2.Bxf5#
      • 2.Qxf5#
    • 1...Bg6
      • 2.Qxg6#
    • 1...Bg8
      • 2.Bf5#
      • 2.Qg6#
      • 2.Qf5#
    • 1...Sb2
      • 2.Sc3#
    • 1...Sf2
      • 2.Re1#
    • 1...Sc3
      • 2.d5#
    • 1...Se3
      • 2.d3#
    • 1...Sb6
      • 2.Sd6#
    • 1...Sd6+
      • 2.Sxd6#
    • 1...Sa7
      • 2.Sd6#
    • 1...Se7
      • 2.Sd6#
    • 1...cxb5
      • 2.Bd5#
    • 1...c5
      • 2.Bd5#
  • Tries
    • 1.Sc3+?
      • 1...Sxc3
        • 2.d5#
      • 1...Bxc3!
    • 1.Bb3?
      • threat
        • 2.Bc2#
      • 1...Sd6+
        • 2.Sxd6#
      • 1...exd4
        • 2.Qe6#
      • 1...cxb5
        • 2.Bd5#
      • 1...Qg3
        • 2.Qxh7#
      • 1...Sb2
        • 2.Sc3#
      • 1...Sf2
        • 2.Re1#
      • 1...Se3
        • 2.d3#
      • 1...axb3!
    • 1.Re1+?
      • 1...Se3
        • 2.Rxe3#
        • 2.d3#
      • 1...Qxe1!
    • 1.dxe5+?
      • 1...Kxe5
        • 2.Qg7#
      • 1...Bd4!
  • Keys
    • 1.Ba2!
      • threat
        • 2.Bb1#
      • 1...Sd6+
        • 2.Sxd6#
      • 1...exd4
        • 2.Qe6#
      • 1...cxb5
        • 2.Bd5#
      • 1...Qg3
        • 2.Qxh7#
      • 1...Sb2
        • 2.Sc3#
      • 1...Sf2
        • 2.Re1#
      • 1...Sc3
        • 2.d5#
      • 1...Se3
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(f);N_GUARD::QAB(J),XB(k)
    • B(k);N_GUARD,P_PINQ(J)::QAB(J),XB(k)
    • S(b);N_GUARD,S_CUTB(a)::S(G)
    • S(b);N_GUARD,S_CUTQ(f)::R(A)
    • S(b);S_CUTB(a)::R(D)+P(E)
    • S(b);SBLOCK::P(B)
    • S(l);N_GUARD::S(G)
    • S(l);CHECK,N_GUARD::S(G),XS(l)
    • P(i);N_GUARD,XS(G)::B(H)
    • P(i);N_GUARD::B(H)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • S(b);XS(G)::R(D)+P(E)
      • Refutation
        • B(a);XS(G)
    • Try
      • B(H);
      • Threat
        • B(H)
      • Vars
        • S(l);CHECK,N_GUARD::S(G),XS(l)
        • P(g);OGATEB,P_SPINP(g),XP(E)::QAR2(J)
        • P(i);N_GUARD,XS(G)::B(H)
        • Q(f);N_GUARD::QAB(J),XB(k)
        • S(b);N_GUARD,S_CUTB(a)::S(G)
        • S(b);N_GUARD,S_CUTQ(f)::R(A)
        • S(b);SBLOCK::P(B)
      • Refutation
        • P(d);XB(H)
    • Try
      • R(A);CHECK
      • Refutation
        • Q(f);XR(A)
    • Try
      • P(E);CHECK,XP(g)
      • Vars
        • K(e);P-FLIGHT,XP(E)::QAB(J)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • B(H);
    • Threat
      • B(H)
    • Vars
      • S(l);CHECK,N_GUARD::S(G),XS(l)
      • P(g);OGATEB,P_SPINP(g),XP(E)::QAR2(J)
      • P(i);N_GUARD,XS(G)::B(H)
      • Q(f);N_GUARD::QAB(J),XB(k)
      • S(b);N_GUARD,S_CUTB(a)::S(G)
      • S(b);N_GUARD,S_CUTQ(f)::R(A)
      • S(b);S_CUTB(a)::R(D)+P(E)
      • S(b);SBLOCK::P(B)
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