MESON Chess Problem Database

Problem Display
PID: 87446 (8/8/8/4p1P1/2p1P1PP/6RP/2Pk1N1Q/6RK w - - 0 1)

Bikov, Nikolai Aleksandrovich

Problemista, 1972

8/8/8/4p1P1/2p1P1PP/6RP/2Pk1N1Q/6RK

#2

11 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Sd1#
      • 2.Sd3#
    • 1...c3
      • 2.Sd3#
  • Tries
    • 1.Rb1?
      • 1...Ke2
        • 2.Sd3#
      • 1...c3
        • 2.Sd3#
      • 1...Kxc2!
    • 1.Rc1?
      • 1...Ke2
        • 2.Sd3#
      • 1...c3
        • 2.Sd3#
      • 1...Kxc1!
    • 1.Ra3?
      • 1...Kxc2
        • 2.Sd3#
      • 1...Ke2
        • 2.Sd1#
      • 1...c3!
    • 1.Rc3?
      • 1...Ke2
        • 2.Sd1#
      • 1...Kxc3!
    • 1.Qg2?
      • 1...Ke2
        • 2.Sd1#
        • 2.Sd3#
      • 1...c3
        • 2.Sd3#
      • 1...Kxc2!
    • 1.c3?
      • 1...Ke2
        • 2.Sd1#
        • 2.Sd3#
      • 1...Kc2!
    • 1.h5?
      • 1...Ke2
        • 2.Sd1#
        • 2.Sd3#
      • 1...c3
        • 2.Sd3#
      • 1...Kxc2!
    • 1.g6?
      • 1...Ke2
        • 2.Sd1#
        • 2.Sd3#
      • 1...c3
        • 2.Sd3#
      • 1...Kxc2!
  • Keys
    • 1.Ra1!
      • 1...Kxc2
        • 2.Sd1#
      • 1...Ke2
        • 2.Sd3#
      • 1...c3
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAR(E)+S(D)
  • Tries
    • Try
      • R(A);
      • Vars
        • K(a);P-FLIGHT::QAR(E)+S(D)
        • P(b);SBLOCK::QAR(E)+S(D)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • R(A);
      • Vars
        • K(a);P-FLIGHT::QAR(E)+S(D)
        • P(b);SBLOCK::QAR(E)+S(D)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • R(F);
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR(E)+S(D)
        • K(a);P-FLIGHT::QAR(E)+S(D)
      • Refutation
        • P(b);
    • Try
      • R(F);
      • Vars
        • K(a);P-FLIGHT::QAR(E)+S(D)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • Q(E);
      • Vars
        • P(b);SBLOCK::QAR(E)+S(D)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • P(C);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(J);
      • Vars
        • P(b);SBLOCK::QAR(E)+S(D)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • P(K);
      • Vars
        • P(b);SBLOCK::QAR(E)+S(D)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
  • Actual
    • R(A);
    • Vars
      • K(a);P-FLIGHT,XP(C)::QAR(E)+S(D)
      • K(a);P-FLIGHT::QAR(E)+S(D)
      • P(b);SBLOCK::QAR(E)+S(D)
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