MESON Chess Problem Database

Problem Display
PID: 250661 (5Q2/1N5K/3p4/r2r1RB1/1p1Pk1p1/8/4B3/1N1R4 w - - 0 1)

Markovtsy, Vassyl Yuriovich

Schweizerische Schachzeitung, 1998

5Q2/1N5K/3p4/r2r1RB1/1p1Pk1p1/8/4B3/1N1R4

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Sxd6#
    • 1...Rc5
      • 2.Sxd6#
    • 1...b3
      • 2.Sc3#
    • 1...g3
      • 2.Bf3#
  • Tries
    • 1.Rxd5?
      • threat
        • 2.Qf5#
      • 1...Rxd5
        • 2.Qf4#
      • 1...Kxd5!
    • 1.Qe7+?
      • 1...Kxf5
        • 2.Bd3#
        • 2.Rf1#
      • 1...Re5!
    • 1.Qe8+?
      • 1...Kxf5
        • 2.Qg6#
      • 1...Re5!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Qf4#
      • 1...Kxf5
        • 2.Qg6#
      • 1...Rxf5
        • 2.Sd2#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Re5
        • 2.Bd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(e);N_GUARD::S(G),XP(f)
    • P(a);N_GUARD::S(A)
    • P(c);N_GUARD::B(C)
  • Tries
    • Try
      • R(E);XR(e)
      • Threat
        • QAB1(I)
      • Vars
        • R(d);SBLOCK,XR(E)::QAR1(I)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • Q(I);CHECK
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • Q(I);CHECK
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(E)::QAB1(I)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • Q(I);XP(f)
    • Threat
      • QAR1(I)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(E)::QAB1(I)
      • R(e);SBLOCK,XR(E)::S(A)
      • R(e);XQ(I)::S(G),XR(e)
      • R(e);::B(C)
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