MESON Chess Problem Database

Problem Display
PID: 136960 (3n4/b1Pq1B2/2p1NP2/R1p1B3/2kP2R1/Pp6/1P2P1P1/2K4Q w - - 0 1)

Janevski, Zivko

Liga Problemista, 1981/8

3n4/b1Pq1B2/2p1NP2/R1p1B3/2kP2R1/Pp6/1P2P1P1/2K4Q

#2

14 + 7

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Sxd8#
    • 1...Bb8
      • 2.Rxc5#
  • Tries
    • 1.Sxd8+?
      • 1...Qe6
        • 2.Bxe6#
      • 1...Qd5
        • 2.dxc5#
      • 1...Qxf7!
    • 1.Ra4+?
      • 1...Kd5
        • 2.e4#
        • 2.g3#
      • 1...Kb5!
    • 1.Qd1?
      • threat
        • 2.d5#
      • 1...Kd5
        • 2.Qxb3#
      • 1...Qxe6
        • 2.dxc5#
      • 1...Qxd4
        • 2.Sxd8#
      • 1...cxd4
        • 2.Qd3#
      • 1...Qd5
        • 2.Qd3#
      • 1...Sxe6!
    • 1.dxc5+?
      • 1...Qd4
        • 2.Sxd8#
        • 2.Rxd4#
      • 1...Kd5!
  • Keys
    • 1.Qf1!
      • threat
        • 2.e4#
      • 1...Kd5
        • 2.e4#
      • 1...Qxd4
        • 2.Sxd8#
      • 1...cxd4
        • 2.e3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(f);N_GUARD,P_SPINQ(f),XP(G)::B(N)+S(K),XS(g)
    • B(e);N_GUARD::R1(I),XP(c)
  • Tries
    • Try
      • S(K);CHECK,XS(g)
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::B(N),XQ(f)
        • Q(f);P_SPINQ(f)::R(H)+P(G),XP(c)
      • Refutation
        • Q(f);XB(N)
    • Try
      • R(I);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • R(H)+P(G)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAB(B),XP(a)
        • Q(f);N_GUARD,P_SPINQ(f),XS(K)::R(H)+P(G),XP(c)
        • Q(f);N_GUARD,P_SPINQ(f),XP(G)::B(N)+S(K),XS(g)
        • P(c);P_SPINP(c),XP(G)::QAB1(B)
        • Q(f);SBLOCK::QAB1(B)
      • Refutation
        • S(g);P_SPINS(g),XS(K)
    • Try
      • P(G);CHECK,XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+P(D)
    • Vars
      • K(b);P_SPINP(c),S_FLIGHT::P(D)
      • Q(f);N_GUARD,P_SPINQ(f),XP(G)::B(N)+S(K),XS(g)
      • P(c);P_SPINP(c),XP(G)::QAB(B)+P(D)
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