MESON Chess Problem Database

Problem Display
PID: 178037 (1K6/8/1P1B2R1/8/3b4/7p/2R3qr/Q4Nk1 w - - 0 1)

Lider, Valentin Viktorovich

Busmen's Chess Review, 1964

1K6/8/1P1B2R1/8/3b4/7p/2R3qr/Q4Nk1

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kh1
      • 2.Sg3#
    • 1...Be3
      • 2.Sxe3#
    • 1...Bc5
      • 2.Sxh2#
      • 2.Se3#
    • 1...Bxb6
      • 2.Sxh2#
      • 2.Se3#
  • Tries
    • 1.Sg3+?
      • 1...Qf1
        • 2.Qxf1#
      • 1...Bxa1!
    • 1.Qxd4+?
      • 1...Kxf1
        • 2.Qa1#
        • 2.Qd1#
      • 1...Kh1!
    • 1.Qe1?
      • threat
        • 2.Sd2#
        • 2.Sxh2#
        • 2.Se3#
      • 1...Kh1
        • 2.Sg3#
      • 1...Qxg6
        • 2.Sxh2#
        • 2.Se3#
        • 2.Sg3#
      • 1...Qg3
        • 2.Sxh2#
        • 2.Se3#
        • 2.Sxg3#
      • 1...Qg4
        • 2.Sxh2#
        • 2.Se3#
        • 2.Sg3#
      • 1...Qg5
        • 2.Sxh2#
        • 2.Se3#
        • 2.Sg3#
      • 1...Rh1
        • 2.Sd2#
        • 2.Sh2#
        • 2.Se3#
      • 1...Bc3
        • 2.Sd2#
      • 1...Be3
        • 2.Sd2#
        • 2.Sxh2#
        • 2.Sxe3#
      • 1...Be5
        • 2.Sd2#
        • 2.Se3#
      • 1...Bf2!
  • Keys
    • 1.Bc5!
      • 1...Qg3+
        • 2.Sxg3#
      • 1...Kh1
        • 2.Sg3#
      • 1...Qxg6
        • 2.Sxh2#
        • 2.Sg3#
      • 1...Bxc5
        • 2.Se3#
      • 1...Qg4
        • 2.Sxh2#
      • 1...Qg5
        • 2.Sxh2#
      • 1...Rh1
        • 2.Bxd4#
      • 1...Bf2
        • 2.Sd2#
      • 1...Be3
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINQ(b),P-FLIGHT::QAR(A)+S(B),DCHECK
    • B(e);N_GUARD::QAR(A)+S(B),XB(e)
  • Tries
    • Try
      • S(B);CHECK,N_PINQ(b)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(A),XQ(b)
      • Refutation
        • B(e);XQ(A)
    • Try
      • Q(A);CHECK,XB(e)
      • Refutation
        • K(a);N_SPINQ(b),P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • K(a);N_SPINQ(b),P-FLIGHT::QAR(A)+S(B),DCHECK
        • B(e);::QAR(A)+S(B)
      • Refutation
        • B(e);
  • Actual
    • B(E);P_PINB(e)
    • Vars
      • Q(b);CHECK,N_GUARD::QAR(A)+S(B),XQ(b)
      • K(a);N_SPINB(e),N_SPINQ(b),P-FLIGHT::QAR(A)+S(B),DCHECK
      • B(e);N_GUARD,N_SPINB(e),XB(E)::QAR(A)+S(B)
      • Q(b);::QAR(A)+S(B),XR(c)
      • R(c);SBLOCK::B(E),XB(e)
      • B(e);::QAR(A)+S(B)
      • B(e);N_GUARD::QAR(A)+S(B),XB(e)
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