MESON Chess Problem Database

Problem Display
PID: 76532 (2b5/kpK5/r2Q4/2P5/8/8/R7/8 w - - 0 1)

Lakeland, Rev T

The Tablet, 1933

(First published on Sat Apr 8 1933)

2b5/kpK5/r2Q4/2P5/8/8/R7/8

#2

4 + 4

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Rxa3#
    • 1...Ra4
      • 2.Rxa4#
    • 1...Ra5
      • 2.Rxa5#
  • Tries
    • 1.Kxc8?
      • threat
        • 2.Qb8#
      • 1...Ka8
        • 2.Qb8#
      • 1...Ra3
        • 2.Rxa3#
      • 1...Ra4
        • 2.Rxa4#
      • 1...Ra5
        • 2.Rxa5#
      • 1...Rxa2!
  • Keys
    • 1.Qd5!
      • 1...Ka8
        • 2.Rxa6#
      • 1...Rxa2
        • 2.Qxa2#
      • 1...Ra3
        • 2.Rxa3#
      • 1...Ra4
        • 2.Rxa4#
      • 1...Ra5
        • 2.Rxa5#
      • 1...Bh3
        • 2.Qxb7#
      • 1...Bg4
        • 2.Qxb7#
      • 1...Bf5
        • 2.Qxb7#
      • 1...Be6
        • 2.Qxb7#
      • 1...Bd7
        • 2.Qxb7#
      • 1...b5
        • 2.cxb5 ep#
      • 1...b6
        • 2.cxb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATEB::R(A),XR(a)
  • Tries
    • Try
      • K(D);P-FLIGHT,XB(d)
      • Threat
        • QAB1(C)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • R(a);OGATEB::R(A),XR(a)
      • Refutation
        • R(a);N_SPINR(a),XR(A)
  • Actual
    • Q(C);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(c)::R(A),XR(a)
      • R(a);N_SPINR(a),OGATE,XR(A)::QAR(C),XR(a)
      • R(a);OGATEB::R(A),XR(a)
      • B(d);N_GUARD::QAR1(C),XP(c)
      • P(c);OGATE::P(B),XP(c),EP
      • P(c);OGATE::P(B),XP(c)
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