MESON Chess Problem Database

Problem Display
PID: 192621 (q4RK1/BPP3P1/1nN1R3/2k5/P1ppP3/1b6/2N5/8 w - - 0 1)

Svitek, Miroslav

2nd Prize, Uralski Problemist, 2008

q4RK1/BPP3P1/1nN1R3/2k5/P1ppP3/1b6/2N5/8

#2

11 + 6

3485 Sachova skladba 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb7
      • 2.Rf5#
    • 1...Qxf8+
      • 2.gxf8Q#
      • 2.gxf8B#
  • Tries
    • 1.bxa8S?
      • threat
        • 2.Bxb6#
        • 2.Rf5#
      • 1...Bxa4
        • 2.Rf5#
      • 1...c3!
  • Keys
    • 1.Sb8!
      • threat
        • 2.Sa6#
        • 2.Sd7#
        • 2.Bxb6#
        • 2.Rc6#
        • 2.Rf5#
        • 2.c8Q#
        • 2.c8R#
      • 1...Qxb7
        • 2.Sd7#
      • 1...Qxa7
        • 2.Rc6#
      • 1...Qxb8
        • 2.Bxb6#
      • 1...Bxc2
        • 2.Sa6#
      • 1...Bxa4
        • 2.Rf5#
      • 1...c3
        • 2.c8Q#
        • 2.c8R#
      • 1...Ba2
        • 2.Sa6#
        • 2.Sd7#
        • 2.Bxb6#
        • 2.Rc6#
        • 2.Rf5#
        • 2.c8Q#
        • 2.c8R#
      • 1...d3
        • 2.Sa6#
        • 2.Sd7#
        • 2.Bxb6#
        • 2.Rc6#
        • 2.Rf5#
        • 2.c8Q#
        • 2.c8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(f);N_PINR(J),XP(G)::R(J)
    • Q(f);CHECK,OGATE,XR(J)::PXQ(f)=Q
  • Tries
    • Try
      • P(G);N_SPINR(J),XQ(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XP(B)::R(J)
      • Refutation
        • P(b);P_PINR(E)
  • Actual
    • S(D);N_SPINR(J)
    • Threat
      • DUALS(7)
    • Vars
      • Q(f);XP(G)::S(D)
      • Q(f);N_SPINS(e),XB(F)::R1(E)
      • Q(f);P_PINR(J),XS(D)::B(F),XS(e)
      • B(a);XS(A)::S(D)
      • B(a);XP(B)::R(J)
      • P(b);P_PINR(E)::P=Q
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