MESON Chess Problem Database

Problem Display
PID: 147218 (8/5N2/N3p3/4p1B1/2p1k2K/2P5/2R5/5Q2 w - - 0 1)

Yakovlev, Yuri Nikolayevich

Canadian Chess Chat, 1983

8/5N2/N3p3/4p1B1/2p1k2K/2P5/2R5/5Q2

#2

7 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Re2+?
      • 1...Kd3
        • 2.Qf3#
      • 1...Kd5!
    • 1.Qg2+?
      • 1...Kd3
        • 2.Sb4#
        • 2.Sc5#
        • 2.Sxe5#
        • 2.Qe2#
      • 1...Kf5!
    • 1.Qxc4+?
      • 1...Kf3
        • 2.Sxe5#
        • 2.Qe2#
        • 2.Qd3#
        • 2.Qg4#
      • 1...Kf5!
    • 1.Qh1+?
      • 1...Kd3
        • 2.Sb4#
      • 1...Kf5!
    • 1.Qf2?
      • 1...Kd3
        • 2.Sc5#
        • 2.Qe2#
      • 1...Kd5!
  • Keys
    • 1.Qb1!
      • 1...Kd3
        • 2.Sc5#
      • 1...Kf3
        • 2.Qh1#
      • 1...Kd5
        • 2.Qb7#
      • 1...Kf5
        • 2.Rf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK,XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::S(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::S(F)
      • K(b);S_FLIGHT::QAB(A)
      • K(b);S_FLIGHT::QAB(A)+R(B),DCHECK
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