MESON Chess Problem Database

Problem Display
PID: 58153 (2K3Q1/1p1Bpp2/2p5/2rk1q1R/Nr1n3R/N7/1n5B/8 w - - 0 1)

Holladay, Edgar Dinwiddie

Chess Life, 1959

2K3Q1/1p1Bpp2/2p5/2rk1q1R/Nr1n3R/N7/1n5B/8

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rbc4
      • 2.Sb6#
    • 1...Rb6
      • 2.Sxb6#
    • 1...Sc4
      • 2.Sc3#
    • 1...Sb5
      • 2.Sb6#
    • 1...Se6
      • 2.Rxf5#
    • 1...b5
      • 2.Sb6#
  • Tries
    • 1.Be6+?
      • 1...Sxe6
        • 2.Rxf5#
      • 1...fxe6
        • 2.Qd8#
      • 1...Kxe6!
    • 1.Qxf7+?
      • 1...Se6
        • 2.Bxe6#
        • 2.Rxf5#
        • 2.Qxe6#
        • 2.Qxf5#
      • 1...e6!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Bxf5#
      • 1...Qxh5
        • 2.Bh3#
        • 2.Bf5#
      • 1...Qe5
        • 2.Bh3#
      • 1...Qg5
        • 2.Bh3#
        • 2.Bf5#
      • 1...Sc4
        • 2.Sc3#
      • 1...Sb5
        • 2.Sb6#
      • 1...Se6
        • 2.Rxf5#
      • 1...e6
        • 2.Be8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::S(C)
    • R(b);N_GUARD::S(C),XR(b)
    • S(a);S_CUTR(d)::S(C)
    • S(c);S_CUTR(b)::S(C)
    • S(c);N_GUARD,N_PINB(F),N_SPINP(j),S_CUTP(i)::R(E),XQ(f)
    • P(h);S_CUTR(b)::S(C)
  • Tries
    • Try
      • B(F);CHECK,N_PINP(j)
      • Vars
        • S(c);SBLOCK,XB(F)::R(E),XQ(f)
        • P(j);P_SPINP(j),SBLOCK,XB(F)::QAR(H)
      • Refutation
        • K(e);N_SPINQ(f),P_SPINP(j),S_FLIGHT,XB(F)
    • Try
      • Q(H);CHECK,XP(j)
      • Refutation
        • P(i);N_PINB(F),P_SPINP(i)
  • Actual
    • Q(H);N_PINP(j)
    • Threat
      • QAR(H)+B(F),XQ(f)
    • Vars
      • Q(f);N_PINB(F)::QAR(H)+B(F)
      • S(a);S_CUTR(d)::S(C)
      • S(c);S_CUTR(b)::S(C)
      • S(c);N_GUARD,N_PINB(F),S_CUTP(i)::R(E),XQ(f)
      • P(i);N_PINB(F),SBLOCK::QAR(H)+B(F)
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