MESON Chess Problem Database

Problem Display
PID: 275600 (8/1p1p4/5Q2/2b3p1/k7/N1B5/P7/1N1K4 w - - 0 1)

Surkov, Ruslan Albertovich

Phenix, 2001

8/1p1p4/5Q2/2b3p1/k7/N1B5/P7/1N1K4

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qxd4#
    • 1...b5
      • 2.Qa6#
  • Tries
    • 1.Qd4+?
      • 1...Bb4
        • 2.Qxb4#
      • 1...Bxd4!
    • 1.Qd8?
      • threat
        • 2.Qa5#
      • 1...Bb6
        • 2.Qxd7#
      • 1...b6
        • 2.Qa8#
      • 1...Bb4!
    • 1.Qf1?
      • threat
        • 2.Qb5#
      • 1...b5
        • 2.Qxb5#
      • 1...Bxa3!
    • 1.Qf4+?
      • 1...Bb4
        • 2.Qxb4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...gxf4!
    • 1.Qb6?
      • threat
        • 2.Qa5#
        • 2.Qb3#
        • 2.Qb5#
      • 1...Bxa3
        • 2.Qa5#
        • 2.Qb3#
      • 1...Bb4
        • 2.Qxb4#
        • 2.Qb5#
      • 1...Bxb6!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qc2#
      • 1...Bxa3
        • 2.Qa5#
      • 1...Bb4
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::QAR(F),XB(b)
    • P(d);N_GUARD::QAR2(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR1(F),XB(b)
      • Refutation
        • B(b);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • B(b);S_CUTP(d)::QAB(F),XP(e)
        • P(d);S_CUTB(b)::QAR(F)
      • Refutation
        • B(b);
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • P(d);::QAB1(F),XP(d)
      • Refutation
        • B(b);XS(D)
    • Try
      • Q(F);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR1(F),XB(b)
        • B(b);N_GUARD,P_SPINB(b)::QAR(F),XB(b)
      • Refutation
        • P(c);XQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Refutation
        • B(b);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • B(b);OGATE,XS(D)::QAR1(F)
      • B(b);OGATE::QAB1(F)
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Developed and maintained by Brian Stephenson.
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