MESON Chess Problem Database

Problem Display
PID: 145712 (6q1/8/1N5B/2QR1p2/2Rnrn2/p2rk2N/K2p4/3B4 w - - 0 1)

Gvozdjak, Peter

2nd Prize, Nagler MT, 2007

6q1/8/1N5B/2QR1p2/2Rnrn2/p2rk2N/K2p4/3B4

#2

8 + 9

23 Die Schwalbe 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Sxd5#
    • 1...Rc3
      • 2.Rxc3#
    • 1...Re5
      • 2.Rxe5#
  • Tries
    • 1.Re5?
      • threat
        • 2.Bxf4#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Rb3
        • 2.Qxd4#
      • 1...Rc3
        • 2.Qxd4#
      • 1...Qg3
        • 2.Sd5#
      • 1...Qg4
        • 2.Sd5#
      • 1...Qg5!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Sc4#
      • 1...Qxd5+
        • 2.Sxd5#
      • 1...Rxc3
        • 2.Qxc3#
      • 1...Re5
        • 2.Qxd4#
      • 1...Re6
        • 2.Qxd4#
      • 1...Re7
        • 2.Qxd4#
      • 1...Re8
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(i);P_PINR(D),XR(F)::S(G),XQ(i)
    • R(c);OGATEB::R(D),XR(c)
    • R(f);OGATEB::R(F),XR(f)
  • Tries
    • Try
      • R(F);P_PINR(f),P_SPINR(D)
      • Threat
        • B(H),XS(g)
      • Vars
        • Q(i);CHECK,XR(D)::S(G),XQ(i)
        • R(f);N_SPINR(f),OGATE,XR(F)::QAR2(E),XR(f)
        • R(c);N_GUARD,N_PINR(D)::QAB1(E),XS(e)
        • R(c);N_GUARD::QAB1(E),XS(e)
        • Q(i);N_GUARD,N_PINR(D)::S(G)
      • Refutation
        • Q(i);N_PINR(D)
  • Actual
    • R(D);P_PINR(c),P_SPINR(F)
    • Threat
      • S(G)
    • Vars
      • Q(i);CHECK,XR(F)::S(G),XQ(i)
      • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(E),XR(c)
      • R(f);N_GUARD::QAB1(E),XS(e)
      • R(f);N_GUARD,N_PINR(F)::QAB1(E),XS(e)
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