MESON Chess Problem Database

Problem Display
PID: 232551 (n7/b5r1/3p4/B1kB4/2P5/7p/8/Q6K w - - 0 1)

Gruber, Lutz-Dieter

Freie Presse, 1987

n7/b5r1/3p4/B1kB4/2P5/7p/8/Q6K

#2

5 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1+
      • 2.Qxg1#
    • 1...Rb7
      • 2.Qg1#
    • 1...Rc7
      • 2.Qg1#
    • 1...Rd7
      • 2.Qg1#
    • 1...Rh7
      • 2.Qg1#
  • Tries
    • 1.Bb4+?
      • 1...Kb6
        • 2.Qa5#
      • 1...Kxb4!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qa5#
      • 1...Rg1+
        • 2.Qxg1#
      • 1...Kb6
        • 2.Qa5#
      • 1...Rb7
        • 2.Qg1#
      • 1...Bb6
        • 2.Qa3#
      • 1...Sc7
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(e);CHECK,N_GUARD::QAB(A),XR(e)
    • R(e);N_GUARD::QAB(A)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XB(D)
  • Actual
    • B(D);
    • Threat
      • QAR2(A)
    • Vars
      • R(e);CHECK,N_GUARD::QAB(A),XR(e)
      • K(b);S_FLIGHT::QAB1(A)
      • R(e);N_GUARD::QAB(A)
      • B(d);SBLOCK::QAB(A)
      • S(f);N_GUARD,S_CUTR(e)::QAB(A),XB(d)
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