MESON Chess Problem Database

Problem Display
PID: 22548 (3n4/4p3/QKpp2p1/3NB1R1/1p2k1p1/7B/2N5/7b w - - 0 1)

Gamza, Grigory Stepanovich

1st Place, Match: Novosibirsk - Volgograd, 1984

3n4/4p3/QKpp2p1/3NB1R1/1p2k1p1/7B/2N5/7b

#2

7 + 9

3748 FIDE Album (1983-1985) 1992
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Bxg2#
    • 1...Bf3
      • 2.Qc4#
    • 1...cxd5
      • 2.Qe2#
  • Tries
    • 1.Se1?
      • threat
        • 2.Qd3#
        • 2.Qc4#
      • 1...cxd5
        • 2.Qe2#
        • 2.Qd3#
      • 1...Se6
        • 2.Qd3#
      • 1...Kxd5!
    • 1.Scxb4?
      • threat
        • 2.Qe2#
        • 2.Qd3#
      • 1...dxe5
        • 2.Qd3#
      • 1...Bf3
        • 2.Qd3#
        • 2.Qc4#
      • 1...Kf3!
    • 1.Sc3+?
      • 1...Kf3
        • 2.Qf1#
        • 2.Qe2#
      • 1...bxc3!
    • 1.Sf6+?
      • 1...Kf3
        • 2.Qf1#
      • 1...exf6!
    • 1.Bxg4?
      • threat
        • 2.Qc4#
      • 1...Kxd5
        • 2.Qd3#
      • 1...cxd5
        • 2.Qe2#
      • 1...Se6!
    • 1.Bg3?
      • threat
        • 2.Qe2#
      • 1...Kf3
        • 2.Qd3#
      • 1...Bf3
        • 2.Qc4#
      • 1...e5!
  • Keys
    • 1.Bf1!
      • threat
        • 2.Qd3#
      • 1...Kf3
        • 2.Qe2#
      • 1...Kxd5
        • 2.Qc4#

Anticipated by 110088(1979)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::B(B),XB(a)
    • B(a);SBLOCK::QAR2(F)
    • P(e);SBLOCK,XS(C)::QAR2(F)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(i);::QAB1(F)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
    • Try
      • S(A);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XB(D)::QAB1(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • P(b);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(F)
      • Refutation
        • P(h);XS(C)
    • Try
      • B(B);XP(d)
      • Threat
        • QAR2(F)
      • Vars
        • K(c);S_FLIGHT,XS(C)::QAR2(F)
        • P(e);SBLOCK,XS(C)::QAR2(F)
      • Refutation
        • S(i);
    • Try
      • B(D);
      • Threat
        • QAR2(F)
      • Vars
        • K(c);S_FLIGHT::QAR2(F)
        • B(a);SBLOCK::QAR2(F)
      • Refutation
        • P(h);
  • Actual
    • B(B);
    • Threat
      • QAB1(F)
    • Vars
      • K(c);S_FLIGHT::QAB1(F)
      • K(c);S_FLIGHT,XS(C)::QAB1(F)
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