MESON Chess Problem Database

Problem Display
PID: 200944 (3b2K1/3N4/2p4B/R1Pk2NR/1Qb1p3/1n4n1/B1P5/8 w - - 0 1)

Coello Alonso, Jose Antonio

BCPS Website, 2020

3b2K1/3N4/2p4B/R1Pk2NR/1Qb1p3/1n4n1/B1P5/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4+
      • 2.Se6#
    • 1...Sa1
      • 2.Qd2#
      • 2.Qxc4#
    • 1...Sc1
      • 2.Qxc4#
    • 1...Sd2
      • 2.Qxd2#
    • 1...Sd4
      • 2.Bxc4#
      • 2.Qxc4#
    • 1...Sxa5
      • 2.Qd2#
    • 1...Sxc5
      • 2.Qd2#
      • 2.Qxc5#
  • Tries
    • 1.Bxb3?
      • threat
        • 2.Qd2#
        • 2.Qxc4#
      • 1...Kd4+
        • 2.Se6#
      • 1...Bxa5
        • 2.Qxc4#
      • 1...Bxg5
        • 2.Qxc4#
      • 1...Bf6
        • 2.Qxc4#
      • 1...Sf1
        • 2.Qxc4#
      • 1...Se2
        • 2.Qxc4#
      • 1...Sf5
        • 2.Qxc4#
      • 1...e3
        • 2.Qxc4#
      • 1...Bxb3!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Qxc4#
      • 1...Kd4+
        • 2.Se6#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Bf1
        • 2.Qd4#
      • 1...Be2
        • 2.Qd4#
      • 1...Bd3
        • 2.Qd4#
      • 1...Bb5
        • 2.Qd4#
      • 1...Ba6
        • 2.Qd4#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sa5
        • 2.Qd2#

This is a version of 200943

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(e);CHECK,P-FLIGHT,P_SPINB(c)::S(F)
    • S(a);P_SPINB(c)::QAB1(C),XB(c)
    • S(a);N_GUARD,P_SPINB(c)::QAR(C),XS(a)
    • S(a);N_GUARD,P_SPINB(c),XR(D)::QAR(C)
  • Tries
    • Try
      • B(A);P_PINB(c),XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(e);CHECK,P-FLIGHT::S(F)
        • B(g);XR(D)::QAB1(C),XB(c)
        • B(g);XS(F)::QAB1(C),XB(c)
        • B(g);::QAB1(C),XB(c)
        • S(b);::QAB1(C),XB(c)
        • P(d);::QAB1(C),XB(c)
      • Refutation
        • B(c);N_SPINB(c),XB(A)
  • Actual
    • R(D);
    • Threat
      • QAB1(C),XB(c)
    • Vars
      • K(e);CHECK,P-FLIGHT,P_SPINB(c)::S(F)
      • S(a);OGATE,P_SPINB(c),XP(E)::QAR1(C),XS(a)
      • B(c);OGATE,P_SPINS(a)::QAR1(C)
      • S(a);N_GUARD,P_SPINB(c)::QAR(C),XS(a)
      • S(a);N_GUARD,P_SPINB(c)::QAR(C)
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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).