MESON Chess Problem Database

Problem Display
PID: 91871 (5K2/7b/5k2/1Q2Nn2/8/7B/8/8 w - - 0 1)

Feofilov, R

Shakhmaty v SSSR, 1946

5K2/7b/5k2/1Q2Nn2/8/7B/8/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf3?
      • 1...Ke6
        • 2.Qc6#
      • 1...Bg6
        • 2.Qe5#
      • 1...Bg8
        • 2.Qxf5#
      • 1...Se3
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qg5#
        • 2.Qb6#
      • 1...Sg3
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qg5#
        • 2.Qb6#
      • 1...Sd4
        • 2.Qg5#
      • 1...Sh4
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qg5#
        • 2.Qb6#
      • 1...Sd6
        • 2.Qg5#
      • 1...Sh6
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qg5#
        • 2.Qb6#
      • 1...Se7
        • 2.Qg5#
      • 1...Sg7
        • 2.Qg5#
      • 1...Kg6!
  • Keys
    • 1.Sf7!
      • 1...Ke6
        • 2.Qc6#
      • 1...Kg6
        • 2.Qxf5#
      • 1...Bg6
        • 2.Qe5#
      • 1...Bg8
        • 2.Qxf5#
      • 1...Se3
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qg5#
        • 2.Qb6#
      • 1...Sg3
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qg5#
        • 2.Qb6#
      • 1...Sd4
        • 2.Qg5#
      • 1...Sh4
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qg5#
        • 2.Qb6#
      • 1...Sd6
        • 2.Qg5#
      • 1...Sh6
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qg5#
        • 2.Qb6#
      • 1...Se7
        • 2.Qg5#
      • 1...Sg7
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a)::QAR2(B)
        • B(c);SBLOCK::QAB1(B)
        • B(c);N_GUARD::QAR1(B),XS(a)
        • S(a);OGATE::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(b);P-FLIGHT,P_SPINS(a)::QAR2(B)
      • K(b);P-FLIGHT::QAB1(B),XS(a)
      • B(c);SBLOCK::QAB1(B)
      • B(c);N_GUARD::QAR1(B),XS(a)
      • S(a);OGATE::QAB1(B)
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