MESON Chess Problem Database

Problem Display
PID: 157712 (8/1k1pNb2/R2Bp1p1/p2NP3/Kp2q3/1R3Q2/P1P1B3/8 w - - 0 1)

Janevski, Zivko

The Problemist, 1974

8/1k1pNb2/R2Bp1p1/p2NP3/Kp2q3/1R3Q2/P1P1B3/8

#2

11 + 8

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Sxe3#
    • 1...Qf4
      • 2.Sxf4#
    • 1...Qh4
      • 2.Sf4#
  • Tries
    • 1.Rxb4+?
      • 1...Qxb4+
        • 2.Sxb4#
      • 1...axb4!
  • Keys
    • 1.Sxb4!
      • threat
        • 2.Qxe4#
      • 1...Qc6+
        • 2.Sbxc6#
      • 1...Qxf3
        • 2.Bxf3#
      • 1...Qd5
        • 2.Sbxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(b);::QAB(E)+S(G),XQ(b)
    • Q(b);::QAB(E)+S(G)
  • Tries
    • Try
      • R(D);CHECK,P_SPINR(D),XP(a)
      • Vars
        • Q(b);CHECK,XR(D)::QAB(E)+S(G),XQ(b)
      • Refutation
        • P(c);XR(D)
  • Actual
    • S(G);P_PINQ(b),P_SPINS(G),XP(a)
    • Threat
      • QAB(E),XQ(b)
    • Vars
      • Q(b);CHECK,N_PINS(G)::R(D)+S(G),XQ(b)
      • Q(b);N_PINS(G),N_SPINQ(b),OGATE,XQ(E)::B(C),XQ(b)
      • Q(b);N_PINS(G)::R(D)+S(G),XQ(b)
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