MESON Chess Problem Database

Problem Display
PID: 93899 (5R2/1Q3r2/2N2R2/p1P1p3/K3k1r1/nP6/1PN1pp1P/1BB5 w - - 0 1)

Valuska, Jan

Sachove umeni (Ceskoslovensky sach), 1964

5R2/1Q3r2/2N2R2/p1P1p3/K3k1r1/nP6/1PN1pp1P/1BB5

#2

12 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3+
      • 2.S2b4#
    • 1...Rxf8
      • 2.S6b4#
    • 1...Sc4
      • 2.Se3#
      • 2.S2b4#
    • 1...Sb5
      • 2.Se3#
      • 2.S2b4#
  • Tries
    • 1.Se3+?
      • 1...Sc2
        • 2.Bxc2#
      • 1...Sxb1!
    • 1.S2b4+?
      • 1...Sc2
        • 2.Bxc2#
      • 1...Sxb1!
    • 1.S6d4+?
      • 1...Kd3
        • 2.Qf3#
      • 1...Rxb7!
    • 1.Qb4+?
      • 1...Kd3
        • 2.Se1#
        • 2.Sxa3#
        • 2.Sxe5#
      • 1...Kd5
        • 2.Se3#
        • 2.Rd6#
      • 1...Sc4
        • 2.Se3#
        • 2.Qxc4#
      • 1...axb4!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Se7#
      • 1...Kf3+
        • 2.S6d4#
      • 1...Kf5+
        • 2.S2d4#
      • 1...Rxb7
        • 2.Sxa3#
      • 1...Rc7
        • 2.Sxa3#
      • 1...Rd7
        • 2.Sxa3#
      • 1...Re7
        • 2.Sxa3#
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • K(d);CHECK,S_FLIGHT::B(A)+S(D),DCHECK
    • R(h);N_GUARD,XR(L)::QAB(K)+S(I)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(A),XS(c)
      • Refutation
        • S(c);XB(A)
    • Try
      • S(D);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(A),XS(c)
      • Refutation
        • S(c);XB(A)
    • Try
      • S(I);CHECK
      • Vars
        • K(d);OGATE,P_PINS(I),S_FLIGHT::QAR2(K)
      • Refutation
        • R(h);XQ(K)
    • Try
      • Q(K);CHECK
      • Refutation
        • P(f);XQ(K)
  • Actual
    • R(J);
    • Threat
      • QAB(K)+S(I)
    • Vars
      • K(d);CHECK,N_GUARD,P_SPINR(h),S_FLIGHT::QAB(K)+S(I),DCHECK
      • K(d);CHECK,P_SPINR(h),S_FLIGHT::B(A)+S(D),DCHECK
      • R(h);XQ(K)::B(A)+S(D),XS(c)
      • R(h);::B(A)+S(D),XS(c)
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