MESON Chess Problem Database

Problem Display
PID: 270780 (5R2/1BBNp3/1P2k2K/1P3p1R/n2pp3/3P4/qpP1Q3/8 w - - 0 1)

Vasilenko, Anatoly Grigorovich

The Problemist, 2023

5R2/1BBNp3/1P2k2K/1P3p1R/n2pp3/3P4/qpP1Q3/8

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd7
      • 2.Bc8#
    • 1...Sc3
      • 2.Sc5#
    • 1...Sc5
      • 2.Sxc5#
    • 1...Sxb6
      • 2.Sc5#
    • 1...f4
      • 2.Qg4#
  • Tries
    • 1.Bd5+?
      • 1...Kxd5
        • 2.Qxe4#
      • 1...Kxd7
        • 2.Rd8#
      • 1...Qxd5!
    • 1.Bc8?
      • threat
        • 2.Sf6#
      • 1...Kd5
        • 2.Qxe4#
      • 1...Sxb6
        • 2.Sxb6#
      • 1...Qd5
        • 2.Sc5#
      • 1...Sc5!
    • 1.Qf1?
      • threat
        • 2.Qxf5#
      • 1...Kxd7
        • 2.Bc8#
      • 1...f4
        • 2.Qh3#
      • 1...Qd5!
    • 1.Qxe4+?
      • 1...Kxd7
        • 2.Bc6#
        • 2.Bc8#
        • 2.Rd8#
        • 2.Qc6#
      • 1...fxe4!
  • Keys
    • 1.Bxe4!
      • threat
        • 2.Bc6#
      • 1...Kxd7
        • 2.Bc6#
      • 1...fxe4
        • 2.Qg4#
      • 1...Qd5
        • 2.Bxf5#
      • 1...Sc3
        • 2.Sc5#
      • 1...Sc5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(g);N_SPINP(e),OGATEB,S_FLIGHT,XS(J)::B(H)
    • S(c);N_GUARD::S(J)
    • S(c);N_GUARD::S(J),XS(c)
    • S(c);N_GUARD,XP(F)::S(J)
    • P(f);OGATEB::QAB(B)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • K(g);N_GUARD,N_SPINP(e),P_SPINP(f),S_FLIGHT,XB(H)::QAB1(B),XP(e)
        • K(g);N_GUARD,N_SPINP(e),S_CUTQ(a),S_FLIGHT,XS(J)::R1(K)
      • Refutation
        • Q(a);XB(H)
    • Try
      • B(H);
      • Threat
        • B(H)+S(J)
      • Vars
        • K(g);N_SPINP(e),P_SPINP(f),S_FLIGHT::QAB1(B),XP(e)
        • S(c);XP(F)::B(H)+S(J),XS(c)
        • Q(a);SBLOCK::B(H)+S(J),DCHECK
      • Refutation
        • S(c);
    • Try
      • Q(B);N_PINP(e)
      • Threat
        • QAB1(B),XP(f)
      • Vars
        • K(g);OGATEB,S_FLIGHT,XS(J)::B(H)
        • P(f);OGATEB::QAB(B)
      • Refutation
        • Q(a);
    • Try
      • Q(B);CHECK,XP(e)
      • Refutation
        • P(f);XQ(B)
  • Actual
    • B(H);XP(e)
    • Threat
      • QAR(B)+B(H)
    • Vars
      • K(g);S_FLIGHT,XS(J)::B(H)
      • P(f);OGATEB,P_SPINP(f),XB(H)::QAB(B)
      • Q(a);SBLOCK::QAR(B)+B(H),DCHECK,XP(f)
      • S(c);N_GUARD::S(J)
      • S(c);N_GUARD::S(J),XS(c)
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