MESON Chess Problem Database

Problem Display
PID: 94982 (8/2B5/1n6/3k4/4R1n1/8/2Q1K3/8 w - - 0 1)

Dubovtsev, Yuri

Cherkasskaya Pravda, 1984

8/2B5/1n6/3k4/4R1n1/8/2Q1K3/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sd7
      • 2.Qc4#
    • 1...Sa8
      • 2.Qc4#
    • 1...Sc8
      • 2.Qc4#
  • Tries
    • 1.Kd3?
      • 1...Se5+
        • 2.Rxe5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sh2
        • 2.Re5#
      • 1...Se3
        • 2.Re5#
      • 1...Sf6
        • 2.Re5#
      • 1...Sh6
        • 2.Re5#
      • 1...Sa4
        • 2.Qc4#
      • 1...Sd7
        • 2.Qc4#
      • 1...Sa8
        • 2.Qc4#
      • 1...Sc8
        • 2.Qc4#
      • 1...Sf2+!
    • 1.Rxg4?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sa4
        • 2.Qc4#
      • 1...Sd7
        • 2.Qc4#
      • 1...Sa8
        • 2.Qc4#
      • 1...Sc8
        • 2.Qc4#
      • 1...Ke6!
    • 1.Re5+?
      • 1...Kd4
        • 2.Qd3#
        • 2.Qc5#
      • 1...Sxe5!
  • Keys
    • 1.Qc3!
      • 1...Kxe4
        • 2.Qd3#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sf2
        • 2.Re5#
      • 1...Sh2
        • 2.Re5#
      • 1...Se3
        • 2.Re5#
      • 1...Sf6
        • 2.Re5#
      • 1...Sh6
        • 2.Re5#
      • 1...Sa4
        • 2.Qc4#
      • 1...Sd7
        • 2.Qc4#
      • 1...Sa8
        • 2.Qc4#
      • 1...Sc8
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAB1(A)
    • S(c);N_GUARD::QAB1(A),XS(c)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • S(a);CHECK,N_GUARD::R1(C),XS(a)
        • S(c);N_GUARD::QAB1(A),XS(c)
        • S(a);N_GUARD::R1(C)
        • S(c);N_GUARD::QAB1(A)
      • Refutation
        • S(a);CHECK
    • Try
      • R(C);XS(a)
      • Vars
        • S(c);N_GUARD::QAB1(A),XS(c)
        • S(c);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • S(a);XR(C)
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT,XR(C)::QAB1(A)
      • S(a);N_GUARD::R1(C),XS(a)
      • S(c);N_GUARD::QAB1(A),XS(c)
      • S(a);N_GUARD::R1(C)
      • S(c);N_GUARD::QAB1(A)
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