MESON Chess Problem Database

Problem Display
PID: 239004 (6b1/1p1Q3q/Np1P3R/2PkNRn1/p7/b1B2p2/K1Bn4/8 w - - 0 1)

Petite, Efren

Problemas, 2014

6b1/1p1Q3q/Np1P3R/2PkNRn1/p7/b1B2p2/K1Bn4/8

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Qxb7#
    • 1...Qe7
      • 2.dxe7#
    • 1...Qh8
      • 2.Qxb7#
    • 1...Bxc5
      • 2.Sc7#
    • 1...Bf7
      • 2.Qxb7#
    • 1...Sf7
      • 2.Qe6#
      • 2.Qxb7#
    • 1...bxc5
      • 2.Sc7#
    • 1...bxa6
      • 2.Qc6#
  • Tries
    • 1.Sc4+?
      • 1...Qxf5
        • 2.Se3#
        • 2.Sxb6#
      • 1...Kxc4!
    • 1.Sg4+?
      • 1...Qxf5
        • 2.Se3#
      • 1...Kc4!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qd3#
      • 1...Qxf5
        • 2.Sc7#
      • 1...Qxh6
        • 2.Sc7#
      • 1...Bxc5
        • 2.Sb4#
      • 1...bxa6
        • 2.Qc6#
      • 1...Qg6
        • 2.Sc7#
      • 1...Sb3
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Se6
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(i);N_GUARD,XR(F)::QAB(J),XP(h)
    • Q(i);OGATE::QAR(J)+P(H),XQ(i)
    • Q(i);N_GUARD::QAB(J),XP(h)
    • B(b);SBLOCK,XP(D)::S(G)
    • B(j);S_CUTQ(i)::QAB(J),XP(h)
    • P(g);SBLOCK,XP(D)::S(G)
    • P(h);N_GUARD,XS(G)::QAB1(J)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(e);S_FLIGHT,XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • Q(i);XR(F)::S(E)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(J);
    • Threat
      • QAR2(J)
    • Vars
      • Q(i);N_GUARD,XR(F)::S(G)
      • Q(i);N_GUARD,XR(I)::S(G)
      • B(b);N_GUARD,P_SPINB(b),XP(D)::S(G)
      • P(h);N_GUARD,XS(G)::QAB1(J)
      • Q(i);N_GUARD::S(G)
      • S(a);N_GUARD::QAB1(J)
      • S(a);N_GUARD::QAB1(J),XS(a)
      • S(f);SBLOCK::R(F)+S(E)
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