MESON Chess Problem Database

Problem Display
PID: 242174 (4K2b/2Nn4/6p1/R3PkP1/8/3N3n/4QP2/1B3R2 w - - 0 1)

Gavrilov, Constantin Grigorievich

Brisbane Courier, 1932

4K2b/2Nn4/6p1/R3PkP1/8/3N3n/4QP2/1B3R2

#2

10 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6+
      • 2.exf6#
  • Tries
    • 1.Sc1+?
      • 1...Kf4
        • 2.Se6#
      • 1...Kxg5!
    • 1.Se1+?
      • 1...Kf4
        • 2.Se6#
      • 1...Kxg5!
    • 1.Sb2+?
      • 1...Kf4
        • 2.Se6#
      • 1...Kxg5!
    • 1.Sb4+?
      • 1...Kf4
        • 2.Se6#
      • 1...Kxg5!
    • 1.Sf4+?
      • 1...Kxf4
        • 2.Se6#
      • 1...Kxg5!
    • 1.Sc5+?
      • 1...Kf4
        • 2.S5e6#
        • 2.S7e6#
      • 1...Kxg5!
    • 1.Qf3+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Kxg5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sdf4#
        • 2.Sdc5#
      • 1...Sf6+
        • 2.exf6#
      • 1...Kxe6
        • 2.Qg4#
      • 1...Sxf2
        • 2.Sdc5#
      • 1...Sxg5
        • 2.Sd4#
      • 1...Sxe5
        • 2.Sdf4#
      • 1...Sf4
        • 2.Sdxf4#
      • 1...Sc5
        • 2.Sdxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(d);CHECK,OGATE::R(F)+P(G),XS(d)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::S(I)
      • Refutation
        • K(b);P-FLIGHT,XP(H)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::S(I)
      • Refutation
        • K(b);P-FLIGHT,XP(H)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::S(I)
      • Refutation
        • K(b);P-FLIGHT,XP(H)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::S(I)
      • Refutation
        • K(b);P-FLIGHT,XP(H)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(E)::S(I)
      • Refutation
        • K(b);P-FLIGHT,XP(H)
    • Try
      • S(E);CHECK
      • Refutation
        • K(b);P-FLIGHT,XP(H)
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
      • Refutation
        • K(b);P-FLIGHT,XP(H)
  • Actual
    • S(I);
    • Threat
      • DUALS(2)
    • Vars
      • S(d);CHECK,OGATE::R(F)+P(G),XS(d)
      • K(b);S_FLIGHT,XS(I)::QAB(C)
      • S(a);P_SPINS(a),XP(D)::B(A)+S(E)
      • S(a);SBLOCK,XP(H)::S(I)
      • S(d);P_SPINS(d),XP(G)::B(A)+S(E)
      • S(a);::B(A)+S(E),XS(a)
      • S(d);::B(A)+S(E),XS(d)
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