MESON Chess Problem Database

Problem Display
PID: 22763 (8/Q6K/8/3pPp1B/4qP2/B4R2/2Pr4/3kN1R1 w - - 0 1)

Kainer, Cenek

Jas, 1930

8/Q6K/8/3pPp1B/4qP2/B4R2/2Pr4/3kN1R1

#2

10 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Rf2#
    • 1...Qxc2
      • 2.Rd3#
    • 1...Qd3
      • 2.Rxd3#
    • 1...Qa4
      • 2.Rd3#
    • 1...Qb4
      • 2.Rd3#
    • 1...Qc4
      • 2.Rd3#
    • 1...Qd4
      • 2.Rd3#
    • 1...Rxc2
      • 2.Rd3#
    • 1...Rf2
      • 2.Rd3#
    • 1...Rg2
      • 2.Rd3#
    • 1...Rh2
      • 2.Rd3#
    • 1...Rd3
      • 2.Rxd3#
    • 1...Rd4
      • 2.Rd3#
  • Tries
    • 1.Sg2+?
      • 1...Kxc2
        • 2.Rc1#
      • 1...Ke2
        • 2.Re1#
        • 2.Rf2#
        • 2.Qf2#
      • 1...Qe1!
    • 1.Rd3+?
      • 1...Qf3
        • 2.Bxf3#
      • 1...Qe2!
  • Keys
    • 1.Qd4!
      • 1...Ke2
        • 2.Rf2#
      • 1...Qxc2
        • 2.Rff1#
        • 2.Rf2#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rd3#
        • 2.Re3#
        • 2.Rfg3#
        • 2.Rh3#
      • 1...Qxf3
        • 2.Bxf3#
      • 1...Qxe1
        • 2.Rc3#
      • 1...Qxd4
        • 2.Rd3#
      • 1...Qxf4
        • 2.Rxf4#
      • 1...Qxe5
        • 2.Re3#
      • 1...Rxd4
        • 2.Rd3#
      • 1...Rd3
        • 2.Rxd3#
      • 1...Qd3
        • 2.Rxd3#
      • 1...Qe2
        • 2.Qa1#
      • 1...Qe3
        • 2.Rxe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 8
  • Sets
    • K(a);S_FLIGHT::B(H)+R(E),DCHECK
    • Q(c);N_GUARD,XP(C)::B(H)+R(E)
    • Q(c);N_GUARD::B(H)+R(E),XQ(c)
    • Q(c);N_GUARD::B(H)+R(E)
    • R(b);XP(C)::B(H)+R(E),DCHECK
    • R(b);::B(H)+R(E),DCHECK
    • R(b);P_PINB(H)::B(H)+R(E),DCHECK
    • R(b);::B(H)+R(E),DCHECK,XR(b)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XP(C)::R1(B)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • R(E);CHECK,P_PINR(b)
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::B(H),XQ(c)
      • Refutation
        • Q(c);P_SPINQ(c)
  • Actual
    • Q(I);P_PINR(b)
    • Vars
      • K(a);N_SPINR(b),S_FLIGHT::B(H)+R(E),DCHECK
      • Q(c);OGATE,P_SPINQ(c),XR(E)::B(H),XQ(c)
      • Q(c);N_GUARD,P_SPINQ(c),XS(A)::B(H)+R(E)
      • Q(c);N_GUARD,N_SPINR(b),XQ(I)::B(H)+R(E)
      • Q(c);OGATE,XP(F)::B(H)+R(E),XQ(c)
      • Q(c);N_GUARD,XP(G)::B(H)+R(E)
      • R(b);N_SPINR(b),XQ(I)::B(H)+R(E),DCHECK
      • R(b);::B(H)+R(E),DCHECK,XR(b)
      • Q(c);N_GUARD,N_SPINR(b)::B(H)+R(E),XQ(c)
      • Q(c);SBLOCK::QAR(I)
      • Q(c);N_GUARD::B(H)+R(E),XQ(c)
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