MESON Chess Problem Database

Problem Display
PID: 258695 (8/2Q2N2/7B/3B4/1r1k4/rnNp2K1/3p4/8 w - - 0 1)

Gamza, Grigory Stepanovich

Buletin Problemistic, 1988

8/2Q2N2/7B/3B4/1r1k4/rnNp2K1/3p4/8

#2

6 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Qxc4#
    • 1...Rb5
      • 2.Qc4#
    • 1...Rb6
      • 2.Qc4#
    • 1...Rb7
      • 2.Qc4#
    • 1...Rb8
      • 2.Qc4#
    • 1...Sc5
      • 2.Qe5#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Be3#
        • 2.Bg7#
      • 1...Rc4
        • 2.Bg7#
        • 2.Qxc4#
      • 1...Sc5
        • 2.Bg7#
        • 2.Qe5#
      • 1...Ra6
        • 2.Be3#
      • 1...Rb6
        • 2.Be3#
        • 2.Qc4#
      • 1...d1S+!
    • 1.Kf4?
      • threat
        • 2.Bg7#
      • 1...Rb6
        • 2.Qc4#
      • 1...Ra6!
    • 1.Sb5+?
      • 1...Rxb5
        • 2.Qc4#
      • 1...Kxd5!
    • 1.Be6?
      • threat
        • 2.Qe5#
      • 1...Rb5
        • 2.Qc4#
      • 1...Ra5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf5#
      • 1...Ke5
        • 2.Bg7#
      • 1...Rc4
        • 2.Sdb5#
      • 1...Sc5
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(e);N_GUARD::QAR1(E),XR(e)
    • R(e);N_GUARD::QAR1(E)
    • S(c);SBLOCK::QAB1(E)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::B(D)
      • Refutation
        • P(a);CHECK
    • Try
      • K(B);S_FLIGHT
      • Threat
        • B(D)
      • Vars
        • R(e);N_GUARD::QAR1(E)
      • Refutation
        • R(b);
    • Try
      • S(A);CHECK
      • Vars
        • R(e);XS(A)::QAR1(E)
      • Refutation
        • K(f);P-FLIGHT,XB(C)
    • Try
      • B(C);
      • Threat
        • QAB1(E)
      • Vars
        • R(e);N_GUARD::QAR1(E)
      • Refutation
        • R(b);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(f);N_GUARD,S_FLIGHT::B(D)
      • R(e);N_GUARD::S(F)
      • S(c);SBLOCK::QAB(E)
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