MESON Chess Problem Database

Problem Display
PID: 168490 (8/3N4/pPRBR3/K2p2p1/p1PkP3/2pp2P1/5P2/5Qn1 w - - 0 1)

Petite, Efren

Problemas, 2014

8/3N4/pPRBR3/K2p2p1/p1PkP3/2pp2P1/5P2/5Qn1

#2

11 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Qa1#
    • 1...d2
      • 2.Bc5#
    • 1...dxc4
      • 2.Bc5#
    • 1...dxe4
      • 2.Be5#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Qxd3#
      • 1...Kxc4
        • 2.Qxd3#
      • 1...dxc4
        • 2.Be5#
      • 1...dxe4
        • 2.Rxe4#
      • 1...d2
        • 2.Be5#
        • 2.Qd3#
      • 1...Se2!
    • 1.Bf4?
      • threat
        • 2.Be3#
      • 1...c2
        • 2.Qa1#
      • 1...gxf4!
    • 1.Qc1?
      • threat
        • 2.Qe3#
      • 1...c2
        • 2.Qb2#
        • 2.Qa1#
      • 1...d2!
    • 1.Qe1?
      • threat
        • 2.Be5#
        • 2.Qe3#
      • 1...d2
        • 2.Qe3#
      • 1...Sf3
        • 2.Qe3#
      • 1...c2
        • 2.Be5#
        • 2.Qa1#
      • 1...Se2!
    • 1.Qxg1?
      • threat
        • 2.f3#
        • 2.f4#
      • 1...dxe4
        • 2.Be5#
      • 1...c2
        • 2.Qa1#
      • 1...d2!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxd3#
      • 1...Kxe4
        • 2.Qxd3#
      • 1...dxc4
        • 2.Rxc4#
      • 1...dxe4
        • 2.Bc5#
      • 1...Se2
        • 2.Sf3#
      • 1...d2
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATEB::QAB(A)
    • P(c);::B(I)
    • P(f);SBLOCK,XP(D)::B(I)
    • P(f);SBLOCK,XP(E)::B(I)
  • Tries
    • Try
      • S(K);
      • Threat
        • QAR1(A),XP(c)
      • Vars
        • K(e);P-FLIGHT,P_SPINP(c),XP(D)::QAB1(A),XP(c)
        • P(f);SBLOCK,XP(D)::B(I)
        • P(f);OGATE,XP(E)::R1(J),XP(f)
      • Refutation
        • S(a);
    • Try
      • B(I);
      • Threat
        • B(I)
      • Vars
        • P(b);OGATEB::QAB(A)
      • Refutation
        • P(g);XB(I)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAB1(A)
        • S(a);::QAB1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);SBLOCK,XP(E)::B(I)
        • P(b);OGATEB::QAB(A)
      • Refutation
        • P(c);
  • Actual
    • S(K);
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • K(e);P-FLIGHT,XP(E)::QAB1(A),XP(c)
      • P(f);OGATE,XP(D)::R1(H),XP(f)
      • P(f);SBLOCK,XP(E)::B(I)
      • S(a);N_GUARD::S(K)
      • P(c);::QAR1(A)
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