MESON Chess Problem Database

Problem Display
PID: 255338 (1b1q2r1/2B1p3/1p2Q1n1/1P6/pP1kNPp1/K2pp3/1P2P3/1B6 w - - 0 1)

Derevchuk, Oleksandr Andrinovich

Kudesnik, 2021

1b1q2r1/2B1p3/1p2Q1n1/1P6/pP1kNPp1/K2pp3/1P2P3/1B6

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.Bxb6#
    • 1...Qe8
      • 2.Bxb6#
    • 1...Qf8
      • 2.Bxb6#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qc4#
        • 2.Qe4#
      • 1...Qxc7
        • 2.Qe4#
      • 1...exd2
        • 2.e3#
      • 1...Se5
        • 2.Qxe5#
      • 1...Qd5!
    • 1.Sc3?
      • threat
        • 2.Qe4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Se5!
    • 1.Qd7+?
      • 1...Kc4
        • 2.Ba2#
        • 2.Bxd3#
        • 2.exd3#
      • 1...Kxe4
        • 2.Bxd3#
      • 1...Qxd7!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Ba2#
      • 1...Sxe5!
  • Keys
    • 1.Ba2!
      • threat
        • 2.Qc4#
      • 1...Qxc7
        • 2.Qd5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Qd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(j);N_GUARD::B(J),XP(f)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);XB(J)::QAR1(I)
        • P(b);OGATE,XS(F)::P(C)
        • S(g);N_GUARD::QAB1(I),XS(g)
      • Refutation
        • Q(j);
    • Try
      • S(F);
      • Threat
        • QAR1(I)
      • Vars
        • Q(j);N_GUARD::QAR1(I),XQ(j)
      • Refutation
        • S(g);
    • Try
      • Q(I);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(a),S_CUTQ(j),XS(F)::B(A),XP(a)
      • Refutation
        • Q(j);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(d);P-FLIGHT,S_CUTS(g)::B(A)
      • Refutation
        • S(g);XQ(I)
  • Actual
    • B(A);
    • Threat
      • QAR1(I)
    • Vars
      • Q(j);N_GUARD,XB(J)::QAR1(I)
      • S(g);N_GUARD::QAB1(I),XS(g)
      • Q(j);N_GUARD::QAR1(I),XQ(j)
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