MESON Chess Problem Database

Problem Display
PID: 86869 (8/2Q5/1N4n1/3P4/3kp3/P1R1n3/8/1K6 w - - 0 1)

Dyadchenko, Grigory P

Molod Ukrainy, 1971

8/2Q5/1N4n1/3P4/3kp3/P1R1n3/8/1K6

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qg7#
    • 1...Sh4
      • 2.Qg7#
    • 1...Se5
      • 2.Qc5#
    • 1...Sf8
      • 2.Qg7#
    • 1...Sh8
      • 2.Qg7#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Qc5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kxd5!
  • Keys
    • 1.Qg3!
      • 1...Kxc3
        • 2.Qxe3#
      • 1...Sxd5
        • 2.Rc4#
      • 1...Sf4
        • 2.Qg7#
      • 1...Sd1
        • 2.Rc4#
      • 1...Sf1
        • 2.Rc4#
      • 1...Sc2
        • 2.Rc4#
      • 1...Sg2
        • 2.Rc4#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Sg4
        • 2.Rc4#
      • 1...Sf5
        • 2.Rc4#
      • 1...Sh4
        • 2.Qg7#
      • 1...Se5
        • 2.Qxe3#
      • 1...Se7
        • 2.Qg7#
      • 1...Sf8
        • 2.Qg7#
      • 1...Sh8
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD::QAB(F)
    • S(d);SBLOCK::QAB1(F)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(F)
      • Vars
        • S(a);N_GUARD::QAR1(F),XS(a)
      • Refutation
        • K(b);P-FLIGHT,XP(D)
  • Actual
    • Q(F);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT,XR(C)::QAR2(F),XS(a)
      • S(a);N_GUARD,XP(D)::R1(C)
      • S(d);OGATE::QAB(F)
      • S(a);N_GUARD::R1(C)
      • S(a);N_GUARD::R1(C),XS(a)
      • S(d);SBLOCK::QAB1(F),XS(a)
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