MESON Chess Problem Database

Problem Display
PID: 275295 (8/3p2N1/3p2Q1/3pkp2/2P1p1BP/2P1R3/6p1/1KN1Rq2 w - - 0 1)

Palazon, Luis Gomez

Best Problems, 2023

8/3p2N1/3p2Q1/3pkp2/2P1p1BP/2P1R3/6p1/1KN1Rq2

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qxf5#
    • 1...Qe2
      • 2.Qxf5#
    • 1...Qd3+
      • 2.Sxd3#
    • 1...Qxc4
      • 2.Qxf5#
    • 1...Qxe1
      • 2.Qxf5#
    • 1...Qg1
      • 2.Sd3#
      • 2.Qxf5#
    • 1...Qh1
      • 2.Sd3#
      • 2.Qxf5#
    • 1...Qf2
      • 2.Sd3#
    • 1...Qf3
      • 2.Sd3#
    • 1...Qf4
      • 2.Sd3#
    • 1...f4
      • 2.Qf5#
      • 2.Qg5#
  • Tries
    • 1.Sxf5?
      • threat
        • 2.Qxd6#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...Qxf5
        • 2.Sd3#
        • 2.Qxf5#
      • 1...Kf4!
    • 1.Se8?
      • threat
        • 2.Qxd6#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...Kf4
        • 2.Qxf5#
      • 1...fxg4!
    • 1.Be2?
      • threat
        • 2.Sd3#
      • 1...Kf4
        • 2.Qg3#
      • 1...Qxe2
        • 2.Qxf5#
      • 1...Qxe1
        • 2.Qxf5#
      • 1...dxc4!
    • 1.Rf3?
      • threat
        • 2.Qxf5#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...fxg4
        • 2.Qf5#
        • 2.Qh5#
        • 2.Qe8#
        • 2.Qg5#
        • 2.Qf6#
      • 1...f4
        • 2.Qf5#
        • 2.Qg5#
      • 1...Qxf3!
    • 1.Qe8+?
      • 1...Kf6
        • 2.Sh5#
      • 1...Kf4!
    • 1.Qe6+?
      • 1...Kf4
        • 2.Qxf5#
      • 1...dxe6!
    • 1.Qf6+?
      • 1...Kf4
        • 2.Qxf5#
      • 1...Kxf6!
  • Keys
    • 1.Bf3!
      • threat
        • 2.Qxf5#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...Kf4
        • 2.Qxd6#
      • 1...Qxf3
        • 2.Sd3#
      • 1...f4
        • 2.Qf5#
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • K(e);N_SPINP(c),S_CUTQ(a),S_FLIGHT::QAR1(I),XP(f)
    • Q(a);N_GUARD::QAR1(I),XP(f)
    • Q(a);CHECK,N_GUARD::S(B),XQ(a)
    • Q(a);N_GUARD,XP(F)::QAR1(I),XP(f)
    • Q(a);N_GUARD,P_PINS(B),XR(C)::QAR1(I),XP(f)
    • Q(a);N_GUARD::S(B)
  • Tries
    • Try
      • S(J);XP(f)
      • Threat
        • QAB1(I),XP(g)
      • Vars
        • Q(a);CHECK,N_GUARD::S(B),XQ(a)
      • Refutation
        • K(e);N_SPINP(c),S_FLIGHT
    • Try
      • S(J);
      • Threat
        • QAB1(I),XP(g)
      • Vars
        • Q(a);CHECK,N_GUARD::S(B),XQ(a)
        • K(e);N_SPINP(c),S_CUTQ(a),S_FLIGHT::QAR1(I),XP(f)
      • Refutation
        • P(f);XB(G)
    • Try
      • B(G);
      • Threat
        • S(B)
      • Vars
        • K(e);N_GUARD,N_SPINP(c),S_CUTP(f),S_CUTQ(a),S_FLIGHT::QAB1(I)
        • Q(a);N_GUARD,XB(G)::QAR1(I),XP(f)
        • Q(a);N_GUARD,P_PINS(B),XR(C)::QAR1(I),XP(f)
      • Refutation
        • P(d);XP(F)
    • Try
      • R(E);
      • Threat
        • QAR1(I),XP(f)
      • Vars
        • Q(a);CHECK,N_GUARD::S(B),XQ(a)
      • Refutation
        • Q(a);XR(E)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);N_SPINP(c),S_FLIGHT::S(J)
      • Refutation
        • K(e);N_SPINP(c),S_FLIGHT
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);N_SPINP(c),S_CUTQ(a),S_FLIGHT::QAR1(I),XP(f)
      • Refutation
        • P(h);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);N_SPINP(c),P_SPINP(f),S_CUTQ(a),S_FLIGHT::QAR1(I),XP(f)
      • Refutation
        • K(e);N_SPINP(c),S_FLIGHT,XQ(I)
  • Actual
    • B(G);
    • Threat
      • QAR1(I),XP(f)
    • Vars
      • Q(a);CHECK,N_GUARD::S(B),XQ(a)
      • K(e);N_GUARD,N_SPINP(c),S_FLIGHT::QAB(I),XP(g)
      • Q(a);N_GUARD,XB(G)::S(B)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).