MESON Chess Problem Database

Problem Display
PID: 52575 (3nKb1B/8/7p/P1k4P/P2RBp2/Pr6/1NrqN3/1n4Q1 w - - 0 1)

Valuska, Jan

1st Place, 04. WCCT, 1989-1992

3nKb1B/8/7p/P1k4P/P2RBp2/Pr6/1NrqN3/1n4Q1

#2

11 + 9

4827 FIDE Album (1989-1991) 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Rd3#
    • 1...Qd3
      • 2.Rxd3#
    • 1...Qxd4
      • 2.Qxd4#
    • 1...Rb5
      • 2.Rxd2#
    • 1...Rb6
      • 2.Rxd2#
    • 1...Rb7
      • 2.Rxd2#
    • 1...Rb8
      • 2.Rxd2#
    • 1...Bd6
      • 2.Rc4#
    • 1...Sc3
      • 2.Rxd2#
    • 1...Sc6
      • 2.Rd5#
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qf5#
      • 1...Qxa5
        • 2.Rd5#
      • 1...Qxd4
        • 2.Bxd4#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Bg7
        • 2.Qd6#
      • 1...Sc3
        • 2.Rc4#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sf7
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD,XP(H)::QAB(A)+R(F)
    • Q(c);N_GUARD::QAB(A)+R(F),XQ(c)
    • Q(c);OGATE,P_SPINQ(c),XR(F)::QAB1(A),XQ(c)
    • R(d);N_GUARD::QAB(A)+R(F),XQ(c)
    • B(i);SBLOCK::QAB(A)+R(F),DCHECK
    • S(a);S_CUTR(d)::QAB(A)+R(F),XQ(c)
    • S(h);SBLOCK::QAB(A)+R(F),DCHECK
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • Q(c);N_GUARD,XP(H)::R1(F)
      • Q(c);OGATE,XR(F)::B(K),XQ(c)
      • B(i);N_GUARD::QAB1(A),XB(i)
      • B(i);N_GUARD::QAB1(A)
      • S(a);S_CUTR(b)::R1(F)
      • S(h);N_GUARD::QAR1(A),XS(h)
      • S(h);N_GUARD::QAR1(A)
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