MESON Chess Problem Database

Problem Display
PID: 238965 (8/1PK1pB2/1n2P3/2pkp1r1/3N3R/1P1b2p1/2NQR3/5n2 w - - 0 1)

Petite, Efren

Problemas, 1998

8/1PK1pB2/1n2P3/2pkp1r1/3N3R/1P1b2p1/2NQR3/5n2

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd2
      • 2.Se3#
    • 1...Sh2
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Sa8+
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...c4
      • 2.Qa5#
    • 1...e4
      • 2.Qxg5#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sc3#
        • 2.Qxd3#
      • 1...Sa8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Sxd2
        • 2.Se3#
        • 2.Sc3#
      • 1...e4
        • 2.Qxg5#
      • 1...Rg4
        • 2.Sc3#
      • 1...Sa4
        • 2.Qxd3#
      • 1...c4!
    • 1.Sf5?
      • threat
        • 2.Sxe7#
        • 2.Qxd3#
      • 1...Sa8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Rxf5
        • 2.Qxd3#
      • 1...Sxd2
        • 2.Sce3#
        • 2.Sfe3#
        • 2.Sxe7#
      • 1...c4
        • 2.Qa5#
      • 1...Rg4
        • 2.Sxe7#
      • 1...Sc8
        • 2.Qxd3#
      • 1...e4!
    • 1.Sc6?
      • threat
        • 2.Sxe7#
        • 2.Qxd3#
      • 1...Sxd2
        • 2.Se3#
        • 2.Sxe7#
      • 1...c4
        • 2.Qa5#
      • 1...Rg4
        • 2.Sxe7#
        • 2.Rxe5#
      • 1...Sc8
        • 2.Qxd3#
      • 1...e4
        • 2.Qxg5#
      • 1...Sa8+!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qxd3#
      • 1...Sa8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Sxd2
        • 2.Se3#
      • 1...c4
        • 2.Qa5#
      • 1...Rg4
        • 2.Rxe5#
      • 1...e4
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD,XQ(B)::S(A)
    • S(a);N_GUARD::S(A)
    • S(a);N_GUARD::S(A),XS(a)
    • S(h);CHECK,OGATE::PXS(h)=Q
    • P(d);OGATEB::QAR(B)
    • P(f);OGATEB::QAR(B),XR(g)
  • Tries
    • Try
      • S(E);P_PINB(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);CHECK,OGATE::PXS(h)=Q
        • P(f);OGATEB::QAR(B),XR(g)
        • R(g);::S(E)
        • S(h);::QAR2(B),XB(b)
      • Refutation
        • P(d);
    • Try
      • S(E);P_PINB(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);CHECK,OGATE::PXS(h)=Q
        • R(g);XS(E)::QAR2(B),XB(b)
        • P(d);OGATEB::QAR(B)
        • R(g);::S(E),XP(i)
        • S(h);::QAR2(B),XB(b)
      • Refutation
        • P(f);
    • Try
      • S(E);P_PINB(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATEB::QAR(B)
        • S(h);::QAR2(B),XB(b)
        • P(f);OGATEB::QAR(B),XR(g)
      • Refutation
        • S(h);CHECK
  • Actual
    • S(E);P_PINB(b)
    • Threat
      • QAR2(B),XB(b)
    • Vars
      • S(h);CHECK,OGATE::PXS(h)=Q
      • S(a);N_GUARD,N_SPINB(b),XQ(B)::S(A)
      • P(d);OGATEB::QAR(B)
      • R(g);N_GUARD::R1(C),XP(f)
      • P(f);OGATEB::QAR(B),XR(g)
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