MESON Chess Problem Database

Problem Display
PID: 241007 (5B2/4R3/Kp2P2b/1p1P1r2/1k2NN1R/pP1p1rp1/P3n3/Q4bq1 w - - 0 1)

Bourd, Evgeny

Shtern, David

Variantim, 2012

5B2/4R3/Kp2P2b/1p1P1r2/1k2NN1R/pP1p1rp1/P3n3/Q4bq1

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rf2
      • 2.Sxd3#
    • 1...Rxd5
      • 2.Sxd5#
    • 1...Sc1
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sd4
      • 2.Qc3#
    • 1...Sxf4
      • 2.Qc3#
  • Tries
    • 1.Qe1+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...d2!
  • Keys
    • 1.Sf2!
      • threat
        • 2.S4xd3#
      • 1...Kc5
        • 2.Rc7#
      • 1...R3xf4
        • 2.Sxd3#
      • 1...R5xf4
        • 2.Rg7#
      • 1...Bxf4
        • 2.Rf7#
      • 1...Sxf4
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...d2
        • 2.S4d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(f);N_GUARD::S(E),XP(e)
    • R(j);XP(G)::S(E),XR(j)
    • S(c);N_GUARD::QAB1(A)
    • S(c);N_GUARD::QAB1(A),XS(c)
    • S(c);N_GUARD,XS(E)::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(A),XS(c)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • S(D);
    • Threat
      • R(F)+S(E),DCHECK,XP(e)
    • Vars
      • K(h);S_FLIGHT::B(K)+R(J),DCHECK
      • R(f);N_GUARD,P_SPINR(f),XS(E)::S(D),XP(e)
      • R(j);N_GUARD,P_SPINR(j),XS(E)::B(K)+R(J)
      • B(l);N_GUARD,P_SPINB(l),XS(E)::B(K)+R(J)
      • S(c);N_GUARD,P_SPINS(c),XS(E)::QAR2(A)
      • S(c);N_GUARD::QAR2(A),XS(c)
      • P(e);::R(F)+S(E),DCHECK
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