MESON Chess Problem Database

Problem Display
PID: 48646 (1Q1R4/2N5/4p3/3NP3/3k4/1K6/3b1P2/3R1B2 w - - 0 1)

Bland, WR

English Mechanic and World of Science, 1878

(First published on Fri Apr 12 1878)

1Q1R4/2N5/4p3/3NP3/3k4/1K6/3b1P2/3R1B2

#2

9 + 3

508 Chess Chips 1878
5454 Near Snap 2009
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qb6#
  • Tries
    • 1.Sc3+?
      • 1...Kc5
        • 2.Qb5#
      • 1...Kxe5!
    • 1.Sf6+?
      • 1...Kc5
        • 2.Qb5#
      • 1...Kxe5!
    • 1.Sb5+?
      • 1...Kc5
        • 2.Qd6#
        • 2.Qc7#
        • 2.Qb6#
        • 2.Qc8#
      • 1...Ke4!
    • 1.Bg2?
      • 1...Kd3
        • 2.Sc3#
        • 2.Sf4#
      • 1...Kc5
        • 2.Qb6#
      • 1...exd5
        • 2.Rxd5#
      • 1...Kxe5!
  • Keys
    • 1.Bd3!
      • 1...Kxd3
        • 2.Sc3#
      • 1...Kc5
        • 2.Qb6#
      • 1...Kxe5
        • 2.Sb5#
      • 1...exd5
        • 2.Rxd5#
      • 1...Bc1
        • 2.Sxe6#
      • 1...Be1
        • 2.Sxe6#
      • 1...Bc3
        • 2.Sxe6#
      • 1...Be3
        • 2.Sxe6#
      • 1...Bb4
        • 2.Sxe6#
      • 1...Bf4
        • 2.Sxe6#
      • 1...Ba5
        • 2.Sxe6#
      • 1...Bg5
        • 2.Sxe6#
      • 1...Bh6
        • 2.Sxe6#

This anticipates 102047(1991)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINB(a),S_FLIGHT::QAB1(H)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);N_SPINB(a),S_FLIGHT::QAR1(H)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT,XP(F)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);N_SPINB(a),S_FLIGHT::QAR1(H)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT,XP(F)
    • Try
      • S(G);CHECK
      • Refutation
        • K(b);N_SPINB(a),P-FLIGHT
    • Try
      • B(B);
      • Vars
        • K(b);N_SPINB(a),S_FLIGHT::QAB1(H)
        • P(c);OGATE,P_SPINP(c),XS(E)::R1(I),XP(c)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT,XP(F)
  • Actual
    • B(B);N_PINB(a)
    • Vars
      • K(b);P-FLIGHT,P_SPINB(a),XB(B)::R(I)+S(E)
      • K(b);S_FLIGHT::QAB1(H)
      • K(b);S_FLIGHT,XP(F)::QAB(H)+S(G)
      • P(c);OGATE,P_SPINP(c),XS(E)::R1(I),XP(c)
      • B(a);::S(G),XP(c)
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