MESON Chess Problem Database

Problem Display
PID: 238550 (8/8/8/8/K2Q2Nq/4pn1B/4p2R/4k1B1 w - - 0 1)

Dyachuk, Vasyl Vasilovich

1st Comm., Problemist Ukraini, 2009

8/8/8/8/K2Q2Nq/4pn1B/4p2R/4k1B1

#2

6 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rh1?
      • threat
        • 2.Bf2#
      • 1...Sxg1
        • 2.Rxg1#
      • 1...Sxd4
        • 2.Bxe3#
      • 1...Qf2
        • 2.Bxf2#
      • 1...Qxg4!
    • 1.Qc3+?
      • 1...Sd2
        • 2.Qc1#
      • 1...Kd1!
  • Keys
    • 1.Bxe3!
      • threat
        • 2.Qa1#
      • 1...Qxg4
        • 2.Bf2#
      • 1...Sxd4
        • 2.Rh1#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Qf6
        • 2.Bf2#
      • 1...Qd8
        • 2.Bf2#
      • 1...Qh7
        • 2.Bf2#
      • 1...Qh8
        • 2.Bf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • R(B)+B(A),DCHECK
      • Vars
        • S(d);OGATE,P_SPINS(d),XB(A)::R(B),XS(d)
        • S(d);N_GUARD,XQ(E)::R(B)+B(A),XP(c)
        • Q(e);::R(B)+B(A),DCHECK,XQ(e)
      • Refutation
        • Q(e);P_PINQ(E),XS(F)
    • Try
      • Q(E);CHECK,P_SPINS(F)
      • Vars
        • S(d);P_SPINS(d)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(A);XP(c)
    • Threat
      • QAR(E)
    • Vars
      • Q(e);N_GUARD,P_PINQ(E),XS(F)::B(A)
      • S(d);N_GUARD,XQ(E)::R(B)
      • S(d);N_GUARD::QAB1(E),XS(d)
      • Q(e);N_GUARD::B(A)
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