MESON Chess Problem Database

Problem Display
PID: 175251 (8/2Q5/2p3K1/3P4/1N2k3/2r1P2n/4R3/3B4 w - - 0 1)

Galitzky, Aleksandr Vasilevich

The Times, 1902

8/2Q5/2p3K1/3P4/1N2k3/2r1P2n/4R3/3B4

#2

7 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Qf4#
    • 1...Sf2
      • 2.Qf4#
    • 1...Sf4+
      • 2.Qxf4#
    • 1...Sg5
      • 2.Qf4#
  • Tries
    • 1.Re1?
      • threat
        • 2.Qe7#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Sg5
        • 2.Qf4#
      • 1...Rxe3!
    • 1.Ra2?
      • threat
        • 2.Qe7#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Kxe3
        • 2.Qe5#
      • 1...Sg5
        • 2.Qf4#
      • 1...Rxe3!
    • 1.Rb2?
      • threat
        • 2.Qe7#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Kxe3
        • 2.Qe5#
      • 1...Sg5
        • 2.Qf4#
      • 1...Rxe3!
    • 1.Rg2?
      • threat
        • 2.Qe7#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Kxe3
        • 2.Qe5#
      • 1...Sg5
        • 2.Qf4#
      • 1...Rxe3!
    • 1.Rh2?
      • threat
        • 2.Qe7#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Kxe3
        • 2.Qe5#
      • 1...Sg5
        • 2.Qf4#
      • 1...Rxe3!
    • 1.Qe5+?
      • 1...Kf3
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Rh2#
      • 1...Kxe5!
    • 1.Qf7?
      • threat
        • 2.Qf5#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Ke5
        • 2.Qe6#
        • 2.Qe7#
      • 1...Rxe3!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Qe7#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Kxe3
        • 2.Qe5#
      • 1...Rxe3
        • 2.Rc4#
      • 1...Sg5
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::QAR1(G)
    • S(b);CHECK,N_GUARD::QAR1(G),XS(b)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR(G)
      • Vars
        • S(b);CHECK,N_GUARD::QAR1(G),XS(b)
        • S(b);N_GUARD::QAR1(G)
      • Refutation
        • R(a);P_SPINR(a),XP(C)
    • Try
      • R(B);
      • Threat
        • QAR(G)
      • Vars
        • S(b);CHECK,N_GUARD::QAR1(G),XS(b)
        • K(c);P-FLIGHT,XP(C)::QAR2(G)
        • S(b);N_GUARD::QAR1(G)
      • Refutation
        • R(a);XP(C)
    • Try
      • R(B);
      • Threat
        • QAR(G)
      • Vars
        • S(b);CHECK,N_GUARD::QAR1(G),XS(b)
        • K(c);P-FLIGHT,XP(C)::QAR2(G)
        • S(b);N_GUARD::QAR1(G)
      • Refutation
        • R(a);XP(C)
    • Try
      • R(B);
      • Threat
        • QAR(G)
      • Vars
        • S(b);CHECK,N_GUARD::QAR1(G),XS(b)
        • K(c);P-FLIGHT,XP(C)::QAR2(G)
        • S(b);N_GUARD::QAR1(G)
      • Refutation
        • R(a);XP(C)
    • Try
      • R(B);
      • Threat
        • QAR(G)
      • Vars
        • S(b);CHECK,N_GUARD::QAR1(G),XS(b)
        • K(c);P-FLIGHT,XP(C)::QAR2(G)
        • S(b);N_GUARD::QAR1(G)
      • Refutation
        • R(a);XP(C)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(c);P-FLIGHT,XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • S(b);CHECK,N_GUARD::QAR1(G),XS(b)
      • Refutation
        • R(a);P_SPINR(a),XP(C)
  • Actual
    • R(B);
    • Threat
      • QAR(G)
    • Vars
      • S(b);CHECK,N_GUARD::QAR1(G),XS(b)
      • K(c);P-FLIGHT,XP(C)::QAR2(G)
      • R(a);OGATE,SBLOCK,XP(C)::R(B)
      • S(b);N_GUARD::QAR1(G)
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