MESON Chess Problem Database

Problem Display
PID: 196627 (8/1N2p3/R1R5/1p6/PkP1K3/6Q1/1b6/1N6 w - - 0 1)

Gamza, Grigory Stepanovich

Suomen Shakki, 1985

8/1N2p3/R1R5/1p6/PkP1K3/6Q1/1b6/1N6

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qa3#
    • 1...Bc1
      • 2.Qc3#
    • 1...Ba3
      • 2.Qxa3#
      • 2.Qc3#
    • 1...Bc3
      • 2.Qxc3#
    • 1...Bd4
      • 2.Qa3#
    • 1...Be5
      • 2.Qa3#
    • 1...Bf6
      • 2.Qa3#
    • 1...Bg7
      • 2.Qa3#
    • 1...Bh8
      • 2.Qa3#
    • 1...bxa4
      • 2.Rab6#
    • 1...bxc4
      • 2.Rcb6#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qb3#
      • 1...bxa4
        • 2.Rab6#
        • 2.Rcb6#
      • 1...bxc4
        • 2.Rxc4#
        • 2.Rcb6#
      • 1...Bc3!
    • 1.Sa5?
      • threat
        • 2.Qb3#
      • 1...Kxa4
        • 2.Qb3#
      • 1...bxa4
        • 2.Qb8#
      • 1...bxc4
        • 2.Rxc4#
      • 1...Bc3!
    • 1.Qe1+?
      • 1...Bc3
        • 2.Qxc3#
      • 1...Kb3!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qb3#
      • 1...Kxc4
        • 2.Qb3#
      • 1...bxa4
        • 2.Rxa4#
      • 1...bxc4
        • 2.Qb8#
      • 1...Bc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • B(a);N_GUARD::QAB1(B)
    • B(a);N_GUARD::QAB1(B),XB(a)
    • P(c);OGATEB,SBLOCK,XP(C)::R(F)
    • P(c);OGATEB,SBLOCK,XP(D)::R(G)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR1(B)
      • Refutation
        • B(a);
    • Try
      • S(H);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);P-FLIGHT,XP(C)::QAB1(B)
        • P(c);OGATEB,SBLOCK,XP(C)::QAR(B)
        • P(c);OGATE,XP(D)::R1(G),XP(c)
      • Refutation
        • B(a);
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(B),XB(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(H);
    • Threat
      • QAR1(B)
    • Vars
      • K(b);P-FLIGHT,XP(D)::QAB1(B)
      • P(c);OGATE,XP(C)::R1(F),XP(c)
      • P(c);OGATEB,SBLOCK,XP(D)::QAR(B)
      • B(a);N_GUARD::QAB1(B),XB(a)
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