MESON Chess Problem Database

Problem Display
PID: 176195 (8/3B4/p6R/k7/1r6/8/2KQ4/8 w - - 0 1)

Speckmann, Werner

Schach-Echo, 1971

8/3B4/p6R/k7/1r6/8/2KQ4/8

#2

4 + 3

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rc6?
      • 1...Ka4
        • 2.Rxa6#
      • 1...Kb5!
  • Keys
    • 1.Kc3!
      • 1...Rb3+
        • 2.Kxb3#
      • 1...Rc4+
        • 2.Kxc4#
      • 1...Rb5
        • 2.Qa2#
      • 1...Rb1
        • 2.Qa2#
      • 1...Rb2
        • 2.Kxb2#
      • 1...Ra4
        • 2.Qg5#
        • 2.Qd5#
      • 1...Rd4
        • 2.Kxd4#
      • 1...Re4
        • 2.Qd5#
      • 1...Rf4
        • 2.Qd5#
      • 1...Rg4
        • 2.Qd5#
      • 1...Rh4
        • 2.Qg5#
        • 2.Qd5#
      • 1...Rb6
        • 2.Qa2#
      • 1...Rb7
        • 2.Qa2#
      • 1...Rb8
        • 2.Qa2#

Anticipated by 108701(1966)

This anticipates 15734(1987)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Vars
        • K(b);N_SPINR(a),P-FLIGHT::B(D)+R(C),DCHECK,XP(c)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
  • Actual
    • K(A);N_PINR(a),P-FLIGHT
    • Vars
      • R(a);CHECK::QAB(B)+K(A),XR(a)
      • R(a);N_GUARD::QAR(B)
      • R(a);::QAB(B)+K(A),XR(a)
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