MESON Chess Problem Database

Problem Display
PID: 105467 (8/8/8/8/3K4/8/1Q4n1/3kbR1b w - - 0 1)

Pypa, Volodimir Iosifovich

Mat, 1991

8/8/8/8/3K4/8/1Q4n1/3kbR1b

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Kd3?
      • threat
        • 2.Qa1#
        • 2.Qb1#
        • 2.Qc2#
        • 2.Qd2#
      • 1...Se3
        • 2.Qa1#
        • 2.Qb1#
        • 2.Qd2#
      • 1...Sf4+!
    • 1.Qb1+?
      • 1...Ke2
        • 2.Qd3#
      • 1...Kd2!
    • 1.Qf2?
      • 1...Sf4
        • 2.Rxe1#
      • 1...Se3
        • 2.Rxe1#
      • 1...Sh4
        • 2.Rxe1#
      • 1...Kc1!
    • 1.Qxg2?
      • 1...Kc1
        • 2.Rxe1#
      • 1...Bxg2!
  • Keys
    • 1.Qc3!
      • 1...Ke2
        • 2.Qd3#
      • 1...Sf4
        • 2.Rxe1#
      • 1...Se3
        • 2.Rxe1#
      • 1...Sh4
        • 2.Rxe1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • DUALS(4)
      • Refutation
        • S(d);CHECK
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(d);N_GUARD::R1(A),XB(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);XS(d)
      • Vars
        • K(a);P-FLIGHT::R(A),XB(b)
      • Refutation
        • B(c);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(a);N_SPINB(b),S_FLIGHT::QAB1(B)
      • S(d);N_GUARD::R1(A),XB(b)
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