MESON Chess Problem Database

Problem Display
PID: 16133 (q5B1/r1Q5/3p1b2/p2r2p1/4kPP1/KNP4R/8/1bB5 w - - 0 1)

Surkov, Ruslan Albertovich

Schach, 2000

q5B1/r1Q5/3p1b2/p2r2p1/4kPP1/KNP4R/8/1bB5

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qc4#
    • 1...Be5
      • 2.Bh7#
  • Tries
    • 1.Sc5+?
      • 1...dxc5
        • 2.Re3#
      • 1...Rxc5!
    • 1.Qc4+?
      • 1...Rd4
        • 2.Qe2#
      • 1...Bd4!
    • 1.Qh7+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...Rxh7!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Re3#
      • 1...Rxd6
        • 2.Sc5#
      • 1...gxf4
        • 2.Qxf4#
      • 1...Rd2
        • 2.Sxd2#
        • 2.Sc5#
      • 1...Rd3
        • 2.Sc5#
      • 1...Re5
        • 2.Qd4#
      • 1...Bd4
        • 2.Sd2#
      • 1...Be5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(d);N_GUARD,S_CUTB(g)::QAR2(H)
    • B(g);S_CUTR(d)::B(I)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • P(f);XS(C)::R1(E)
      • Refutation
        • R(d);XS(C)
    • Try
      • Q(H);CHECK
      • Vars
        • R(d);P_SPINR(d)::QAR2(H)
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • Q(H);CHECK
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::QAB1(H),XR(d)
      • Refutation
        • R(h);XQ(H)
  • Actual
    • Q(H);XP(f)
    • Threat
      • R1(E)
    • Vars
      • R(d);N_GUARD,XQ(H)::S(C)
      • P(e);OGATE,XP(F)::QAR1(H),XP(e)
      • R(d);N_GUARD::S(C)
      • R(d);OGATE::QAR1(H)
      • B(g);S_CUTR(d)::S(C)
      • B(g);OGATE::QAB(H)
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