MESON Chess Problem Database

Problem Display
PID: 268498 (8/2p1n3/n4N2/1PppP3/P1k1q1R1/8/PBB1N2p/2R1KQ2 w - - 0 1)

Holladay, Edgar Dinwiddie

Die Schwalbe, 1975

8/2p1n3/n4N2/1PppP3/P1k1q1R1/8/PBB1N2p/2R1KQ2

#2

12 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Ba3?
      • threat
        • 2.Bb1#
        • 2.Bxe4#
      • 1...Qxg4
        • 2.Bb1#
        • 2.Be4#
        • 2.Bf5#
        • 2.Bg6#
        • 2.Bh7#
      • 1...Qd4
        • 2.Bb1#
        • 2.Bf5#
        • 2.Bg6#
        • 2.Bh7#
      • 1...Qf4
        • 2.Bb1#
        • 2.Bf5#
        • 2.Bg6#
        • 2.Bh7#
      • 1...d4
        • 2.Bxe4#
      • 1...Sb4!
    • 1.Bd1+?
      • 1...Kd3
        • 2.Rc3#
      • 1...Kb4!
    • 1.Bb3+?
      • 1...Kd3
        • 2.Rc3#
      • 1...Kb4!
    • 1.Bd3+?
      • 1...Kxd3
        • 2.Rc3#
      • 1...Kb4!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Bxe4#
      • 1...Kxd5
        • 2.Qf7#
      • 1...Qxg4
        • 2.Be4#
      • 1...Sxd5
        • 2.Rxe4#
      • 1...Qd4
        • 2.Sec3#
      • 1...Qf4
        • 2.Sexf4#
      • 1...Sb4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);N_SPINQ(c)::R(A)+B(F),XQ(c)
      • Refutation
        • S(f);
    • Try
      • B(F);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINQ(c),S_FLIGHT::R1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • B(F);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINQ(c),S_FLIGHT::R1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • B(F);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINQ(c),S_FLIGHT,XB(F)::R1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(L);XP(e)
    • Threat
      • R(A)+B(F),XQ(c)
    • Vars
      • K(b);N_SPINQ(c),OGATEB,S_FLIGHT,XS(L)::QAB(C)
      • Q(c);N_PINS(G),N_SPINQ(c),XR(I)::R(A)+B(F)
      • S(h);SBLOCK,XS(L)::R(I),XQ(c)
      • Q(c);N_PINS(G)::QAB(C)+S(G)
      • Q(c);N_PINS(G)::QAB(C)+S(G),XQ(c)
      • S(f);SBLOCK::S(L)
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