MESON Chess Problem Database

Problem Display
PID: 147373 (K4N2/NP1R3P/p5p1/4kpP1/1B2Pr2/6n1/3PP3/bb1Qn2q w - - 0 1)

Anonymous

Probleemblad, 1973

K4N2/NP1R3P/p5p1/4kpP1/1B2Pr2/6n1/3PP3/bb1Qn2q

#2

12 + 10

259 Thema Danicum 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.h8Q#
      • 2.h8B#
    • 1...Rxe4
      • 2.b8Q#
      • 2.b8B#
    • 1...Bd4
      • 2.Re7#
    • 1...Bxe4
      • 2.Qxa1#
    • 1...Sxe4
      • 2.Sc6#
  • Tries
    • 1.Sxg6+?
      • 1...Ke6
        • 2.Re7#
      • 1...Kxe4!
    • 1.Bc3+?
      • 1...Kxe4
        • 2.Qa4#
      • 1...Bxc3!
    • 1.Bd6+?
      • 1...Kd4
        • 2.Qa4#
      • 1...Kxe4!
    • 1.d4+?
      • 1...Bxd4
        • 2.Re7#
        • 2.Qxd4#
      • 1...Kxe4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Bd6#
      • 1...Kxe4
        • 2.Bc3#
      • 1...Qxe4
        • 2.h8Q#
        • 2.h8B#
      • 1...Rxe4
        • 2.b8Q#
        • 2.b8B#
      • 1...Bxe4
        • 2.Qxa1#
      • 1...Sxe4
        • 2.Sc6#
      • 1...fxe4
        • 2.Qa5#
      • 1...Bd4
        • 2.Re7#

This is a version of 16456

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(d);N_GUARD,P_PINP(H),SBLOCK,XP(E)::P=Q
    • R(f);SBLOCK,XP(E)::P=Q
    • B(a);SBLOCK::R(I)
    • B(b);OGATE,P_PINP(H),SBLOCK,XP(E)::QAB(A),XB(a)
    • S(e);SBLOCK,XP(E)::S(G)
  • Tries
    • Try
      • S(L);CHECK,XP(j)
      • Vars
        • K(g);P-FLIGHT::R1(I)
      • Refutation
        • K(g);P-FLIGHT,XP(E)
    • Try
      • B(D);CHECK
      • Vars
        • K(g);P-FLIGHT,XP(E)::QAR(A)
      • Refutation
        • B(a);XB(D)
    • Try
      • B(D);CHECK
      • Vars
        • K(g);S_FLIGHT::QAR(A)
      • Refutation
        • K(g);P-FLIGHT,XP(E)
    • Try
      • P(B);CHECK
      • Refutation
        • K(g);P-FLIGHT,XP(E)
  • Actual
    • Q(A);
    • Threat
      • B(D)
    • Vars
      • K(g);P-FLIGHT,XP(E)::QAR(A)+B(D)
      • Q(d);N_GUARD,P_PINP(H),SBLOCK,XP(E)::P=Q
      • R(f);SBLOCK,XP(E)::P=Q
      • B(b);P_PINP(H),SBLOCK,XP(E)::QAB(A),XB(a)
      • S(e);SBLOCK,XP(E)::S(G)
      • P(h);SBLOCK,XP(E)::QAR(A)
      • B(a);SBLOCK::R(I)
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