MESON Chess Problem Database

Problem Display
PID: 196985 (1n1RN3/B2n2p1/r3P1Nb/1B1k1p2/2p1p3/8/6Q1/2R2K2 w - - 0 1)

Beechey, H

Brisbane Courier, 1919

1n1RN3/B2n2p1/r3P1Nb/1B1k1p2/2p1p3/8/6Q1/2R2K2

#2

9 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Bxc4#
    • 1...Rd6
      • 2.Sc7#
    • 1...Sc6
      • 2.Bxc4#
  • Tries
    • 1.Rd1+?
      • 1...Kxe6
        • 2.Bxc4#
      • 1...Bd2!
    • 1.Qd2+?
      • 1...Kxe6
        • 2.Bxc4#
      • 1...Bxd2!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qe5#
      • 1...Kxe6
        • 2.Bxc4#
      • 1...Rxe6
        • 2.Qd4#
      • 1...Rd6
        • 2.Sc7#
      • 1...Bf4
        • 2.Sxf4#
      • 1...Sc6
        • 2.Bxc4#
      • 1...c3
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINP(b),N_SPINS(g),S_FLIGHT,XP(E)::B(D),XP(a)
    • R(e);N_SPINS(g),SBLOCK::S(I)
    • S(i);SBLOCK::B(D),XP(a)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(c);N_SPINP(b),N_SPINS(g),S_FLIGHT,XP(E)::B(D),XP(a)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • K(c);N_SPINS(g),S_FLIGHT,XP(E)::B(D),XP(a)
      • Refutation
        • B(f);XQ(C)
  • Actual
    • Q(C);N_PINP(b)
    • Threat
      • QAR1(C)
    • Vars
      • K(c);N_SPINS(g),S_FLIGHT,XP(E)::B(D),XP(a)
      • R(e);SBLOCK,XP(E)::QAR1(C)
      • R(e);N_SPINS(g),SBLOCK::S(I)
      • B(f);N_GUARD::S(F),XB(f)
      • S(i);SBLOCK::B(D),XP(a)
      • P(a);OGATEB::QAB(C)
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