MESON Chess Problem Database

Problem Display
PID: 143535 (4n3/3Pq1B1/B1pp1NP1/R2p1P2/K2kP2R/2pP4/5P2/3Q4 w - - 0 1)

Janevski, Zivko

Die Schwalbe, 2011

4n3/3Pq1B1/B1pp1NP1/R2p1P2/K2kP2R/2pP4/5P2/3Q4

#2

13 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.d4#
    • 1...Qxe4
      • 2.Sxe8#
    • 1...c2
      • 2.Qa1#
    • 1...dxe4
      • 2.dxe4#
  • Tries
    • 1.Sxe8+?
      • 1...Qf6
        • 2.Bxf6#
      • 1...Qe5
        • 2.exd5#
      • 1...Qxg7!
    • 1.Qe1?
      • threat
        • 2.e5#
      • 1...Ke5
        • 2.Qxc3#
      • 1...Qxf6
        • 2.exd5#
      • 1...Qxe4
        • 2.Sxe8#
      • 1...dxe4
        • 2.Qe3#
      • 1...Qe5
        • 2.Qe3#
      • 1...Sxf6!
    • 1.exd5+?
      • 1...Qe4
        • 2.Sxe8#
        • 2.Rxe4#
      • 1...Ke5!
  • Keys
    • 1.Qg1!
      • threat
        • 2.f4#
      • 1...Ke5
        • 2.f4#
      • 1...Qxe4
        • 2.Sxe8#
      • 1...dxe4
        • 2.f3#
      • 1...c2
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATE,P_SPINP(c),S_FLIGHT::P(C)
    • Q(f);N_GUARD,P_SPINQ(f),XP(E)::B(M)+S(J),XS(g)
    • P(a);OGATEB::QAB(A)
    • P(c);OGATE,P_SPINP(c),XP(E)::QAR(A)+P(C),XP(c)
  • Tries
    • Try
      • S(J);CHECK,XS(g)
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::B(M),XQ(f)
        • Q(f);P_SPINQ(f)::R(F)+P(E),XP(c)
      • Refutation
        • Q(f);XB(M)
    • Try
      • Q(A);
      • Threat
        • R(F)+P(E)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAB(A),XP(a)
        • Q(f);N_GUARD,P_SPINQ(f),XS(J)::R(F)+P(E),XP(c)
        • Q(f);N_GUARD,P_SPINQ(f),XP(E)::B(M)+S(J),XS(g)
        • P(c);P_SPINP(c),XP(E)::QAB1(A)
        • Q(f);SBLOCK::QAB1(A)
      • Refutation
        • S(g);P_SPINS(g),XS(J)
    • Try
      • P(E);CHECK,XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+P(B)
    • Vars
      • K(b);P_SPINP(c),S_FLIGHT::P(B)
      • Q(f);N_GUARD,P_SPINQ(f),XP(E)::B(M)+S(J),XS(g)
      • P(c);P_SPINP(c),XP(E)::QAB(A)+P(B)
      • P(a);OGATEB::QAB(A)
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