MESON Chess Problem Database

Problem Display
PID: 196803 (B5R1/8/2qppN2/1pb5/3P1p2/pR1K1k1p/rP3r2/4BQ1n w - - 0 1)

Anonymous

BCPS Victory Ty., 1919

B5R1/8/2qppN2/1pb5/3P1p2/pR1K1k1p/rP3r2/4BQ1n

#2

9 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4+
      • 2.Bxe4#
    • 1...Rxf1
      • 2.Kd2#
    • 1...Bxd4
      • 2.Kxd4#
    • 1...Sg3
      • 2.Qxf2#
    • 1...b4
      • 2.Kc4#
  • Tries
    • 1.Bxf2?
      • threat
        • 2.Kc2#
        • 2.Kd2#
        • 2.Qe2#
      • 1...Qe4+
        • 2.Kd2#
        • 2.Bxe4#
      • 1...Sxf2+
        • 2.Kc2#
        • 2.Kd2#
      • 1...Bxd4
        • 2.Kxd4#
        • 2.Qe2#
      • 1...Bb4
        • 2.Qe2#
      • 1...Bb6
        • 2.Kd2#
        • 2.Qe2#
      • 1...Ba7
        • 2.Kd2#
        • 2.Qe2#
      • 1...Sg3
        • 2.Kc2#
        • 2.Kd2#
        • 2.Bxg3#
      • 1...Rxb2!
    • 1.Qg1?
      • threat
        • 2.Qg4#
      • 1...Qe4+
        • 2.Bxe4#
      • 1...Rd2+
        • 2.Kxd2#
      • 1...Sg3
        • 2.Qxf2#
      • 1...Rg2!
  • Keys
    • 1.Kc3!
      • threat
        • 2.Qd3#
      • 1...Bb4+
        • 2.Kxb4#
      • 1...Bxd4+
        • 2.Kxd4#
      • 1...Bb6+
        • 2.Kb4#
      • 1...Ba7+
        • 2.Kb4#
      • 1...b4+
        • 2.Kc4#
      • 1...Ke3
        • 2.Qd3#
      • 1...Rxf1
        • 2.Kd2#
      • 1...Sg3
        • 2.Qxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(j);CHECK,OGATE::B(H),XQ(j)
    • R(c);N_SPINR(c),XQ(B)::R(D)+K(E)
    • B(i);XP(F)::R(D)+K(E),XB(i)
    • S(a);N_GUARD::QAR1(B),XR(c)
    • P(h);::R(D)+K(E)
  • Tries
    • Try
      • B(A);XR(c)
      • Threat
        • DUALS(3)
      • Vars
        • B(i);::QAB1(B)
      • Refutation
        • R(b);XP(C)
    • Try
      • Q(B);N_PINR(c)
      • Threat
        • QAB1(B)
      • Vars
        • Q(j);CHECK,OGATE::B(H),XQ(j)
        • R(c);CHECK::R(D)+K(E),XR(c)
        • S(a);N_GUARD::QAR1(B),XR(c)
      • Refutation
        • R(c);
  • Actual
    • K(E);P-FLIGHT
    • Threat
      • QAR2(B)
    • Vars
      • B(i);CHECK::R(D)+K(E),XB(i)
      • B(i);CHECK,XP(F)::R(D)+K(E),XB(i)
      • B(i);CHECK::R(D)+K(E)
      • P(h);CHECK::R(D)+K(E)
      • K(e);N_SPINQ(j),N_SPINR(c),P-FLIGHT::QAR1(B)
      • R(c);N_SPINR(c),XQ(B)::R(D)+K(E)
      • S(a);N_GUARD::QAR1(B),XR(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).