MESON Chess Problem Database

Problem Display
PID: 270871 (2K5/2QR4/8/8/8/4N1n1/4RN1k/5b2 w - - 0 1)

Larsson, Gustaf Lennart

Schackvarlden, 1931

2K5/2QR4/8/8/8/4N1n1/4RN1k/5b2

#2

6 + 3

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Re1?
      • 1...Kg1
        • 2.Qxg3#
      • 1...Be2
        • 2.Rh1#
      • 1...Bg2
        • 2.Seg4#
      • 1...Bd3
        • 2.Rh1#
      • 1...Bh3
        • 2.Rh1#
      • 1...Bc4
        • 2.Rh1#
        • 2.Rh7#
      • 1...Bb5
        • 2.Rh1#
        • 2.Rh7#
      • 1...Ba6+!
  • Keys
    • 1.Rd1!
      • 1...Bh3+
        • 2.Sfg4#
      • 1...Kg1
        • 2.Qxg3#
      • 1...Bxe2
        • 2.Rh1#
      • 1...Bg2
        • 2.Seg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Vars
        • K(b);N_GUARD,N_SPINS(c),P_SPINB(a),S_FLIGHT::QAR2(D),XS(c)
        • B(a);OGATE::R1(A)
        • B(a);SBLOCK::S(C)
        • B(a);OGATE,P_PINR(E)::R1(A)
      • Refutation
        • B(a);CHECK
  • Actual
    • R(E);
    • Vars
      • B(a);CHECK,SBLOCK::R(A)+S(B),DCHECK
      • K(b);N_GUARD,N_SPINS(c),P_SPINB(a),S_FLIGHT::QAR2(D),XS(c)
      • B(a);OGATE,XR(A)::R1(E)
      • B(a);SBLOCK::S(C)
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