MESON Chess Problem Database

Problem Display
PID: 73649 (1r4B1/2QP4/1p3p2/1p4P1/3kPB1R/pr1P1p2/b7/3R1K2 w - - 0 1)

Gamza, Grigory Stepanovich

Freie Presse, 1993

1r4B1/2QP4/1p3p2/1p4P1/3kPB1R/pr1P1p2/b7/3R1K2

#2

10 + 9

6113 Problemschach-Jahrbuch (1993) 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Rb7
      • 2.d8Q#
      • 2.d8R#
    • 1...b4
      • 2.Qc4#
    • 1...fxg5
      • 2.Qe5#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Bg3?
      • threat
        • 2.Bf2#
      • 1...Ke3
        • 2.Bf2#
      • 1...f2
        • 2.Bxf2#
      • 1...Rb2!
    • 1.Be5+?
      • 1...Ke3
        • 2.Qc1#
      • 1...fxe5!
  • Keys
    • 1.Bd2!
      • threat
        • 2.Qd6#
      • 1...Kxd3
        • 2.Bc1#
      • 1...Rxd3
        • 2.e5#
      • 1...Rb1
        • 2.Qc3#
      • 1...Rb2
        • 2.Qc3#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rb4
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(i);N_GUARD::P=Q
    • P(f);N_GUARD::QAR1(H)
    • P(h);N_GUARD,XP(G)::QAB1(H)
    • P(h);N_GUARD::QAB1(H)
  • Tries
    • Try
      • B(E);
      • Threat
        • B(E)
      • Vars
        • K(e);S_FLIGHT::B(E)
        • P(d);::B(E),XP(d)
      • Refutation
        • R(c);
    • Try
      • B(E);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB(H)
      • Refutation
        • P(h);XB(E)
  • Actual
    • B(E);
    • Threat
      • QAR2(H)
    • Vars
      • K(e);OGATEB,P-FLIGHT,XP(C)::R(A)+B(E)
      • R(c);SBLOCK,XP(C)::R(F)+P(D)
      • R(c);N_GUARD,P_PINR(A)::QAB1(H)
      • R(c);N_GUARD::QAB1(H)
      • R(c);N_GUARD::QAB1(H),XR(c)
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