MESON Chess Problem Database

Problem Display
PID: 56105 (8/K3Bp1q/5P1N/1b2kp2/4P2R/n1r5/BQ6/b2Rn3 w - - 0 1)

Kondratiev, Pavel E

Troll, 1994

8/K3Bp1q/5P1N/1b2kp2/4P2R/n1r5/BQ6/b2Rn3

#2

9 + 9

6114 Problemschach-Jahrbuch (1994) 1995
3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh8
      • 2.Sxf7#
    • 1...Bc6
      • 2.Qb8#
  • Tries
    • 1.Qh2+?
      • 1...f4
        • 2.Qxf4#
      • 1...Rg3!
    • 1.Qxb5+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Sxb5+!
  • Keys
    • 1.exf5!
      • threat
        • 2.Rd5#
      • 1...Qxf5
        • 2.Sxf7#
      • 1...Bd3
        • 2.Qh2#
      • 1...Bc4
        • 2.Qb8#
      • 1...Bc6
        • 2.Qb8#
      • 1...Sd3
        • 2.Qe2#
      • 1...Sc4
        • 2.Qxb5#

Anticipated by 226410(1952)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(i);N_GUARD::S(G),XP(h)
    • B(e);OGATE::QAB(C)
  • Tries
    • Try
      • Q(C);CHECK,N_PINR(d)
      • Vars
        • P(g);P_SPINP(g)::QAB1(C),XP(g)
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • Q(C);CHECK,N_PINR(d),XB(e)
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::QAR2(C),XR(d)
      • Refutation
        • S(c);CHECK,XQ(C)
  • Actual
    • P(D);XP(g)
    • Threat
      • R1(A)
    • Vars
      • Q(i);N_GUARD,SBLOCK,XP(D)::S(G),XP(h)
      • B(e);::QAB(C)
      • B(e);OGATE::QAB(C)
      • S(b);S_CUTB(e)::QAR(C)
      • S(c);N_GUARD::QAR(C),XB(e)
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