MESON Chess Problem Database

Problem Display
PID: 214811 (8/8/8/6QP/2pNp3/3pP2R/3k1P2/1R4K1 w - - 0 1)

Doukhan, Gerard

Best Problems, 2020

8/8/8/6QP/2pNp3/3pP2R/3k1P2/1R4K1

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qa5#
  • Tries
    • 1.Kf1?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.Kh1?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.Kg2?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.Kh2?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.Rh1?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.Rg3?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.Rh4?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.Qe7?
      • 1...Kc3
        • 2.Qb4#
      • 1...c3!
    • 1.Qd8?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.Qg2?
      • 1...c3
        • 2.f4#
      • 1...Kc3!
    • 1.Qg4?
      • 1...c3
        • 2.Rd1#
        • 2.Qd1#
      • 1...Kc3!
    • 1.Qb5?
      • threat
        • 2.Qb2#
      • 1...Kc3
        • 2.Qb2#
        • 2.Qb4#
        • 2.Qa5#
      • 1...c3!
    • 1.Qc5?
      • 1...Kc3
        • 2.Qb4#
        • 2.Qa5#
      • 1...c3!
    • 1.Qd5?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.Qe5?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.Qf5?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
    • 1.f3?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3
        • 2.Rh2#
      • 1...exf3!
    • 1.f4?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3
        • 2.Qg2#
      • 1...exf4 ep!
    • 1.h6?
      • 1...Kc3
        • 2.Qa5#
      • 1...c3!
  • Keys
    • 1.Rh2!
      • 1...Kc3
        • 2.Qa5#
      • 1...c3
        • 2.f3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(G)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • R(E);
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • R(E);
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • R(E);
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB1(G)
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Vars
        • P(c);SBLOCK::QAR(G)+P(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
    • Try
      • P(C);
      • Vars
        • K(a);S_FLIGHT::QAB(G)
        • P(c);SBLOCK::R(E)
      • Refutation
        • P(d);XP(C)
    • Try
      • P(C);
      • Vars
        • K(a);S_FLIGHT::QAB(G)
        • P(c);SBLOCK::QAR(G)
      • Refutation
        • P(d);EP,XP(C)
    • Try
      • P(H);
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • P(c);
  • Actual
    • R(E);
    • Vars
      • K(a);S_FLIGHT::QAB(G)
      • P(c);SBLOCK::R(E)+P(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).