MESON Chess Problem Database

Problem Display
PID: 271709 (1Bb5/1rn1N1RK/q1pn4/5p2/1b1p1k1p/3Q4/7P/4Rr2 w - - 0 1)

Gasparyan, Alexey

The Hopper, 2023

1Bb5/1rn1N1RK/q1pn4/5p2/1b1p1k1p/3Q4/7P/4Rr2

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qxf1#
    • 1...Qa4
      • 2.Qxf1#
    • 1...Qa5
      • 2.Qxf1#
    • 1...Qb6
      • 2.Qxf1#
    • 1...Qa7
      • 2.Qxf1#
    • 1...Qa8
      • 2.Qxf1#
    • 1...Rb5
      • 2.Qxf1#
    • 1...Sc4
      • 2.Qxf1#
    • 1...Sdb5
      • 2.Qxf1#
    • 1...Scb5
      • 2.Qxf1#
    • 1...Se6
      • 2.Qxf5#
    • 1...h3
      • 2.Qg3#
  • Tries
    • 1.Qxd4+?
      • 1...Kf3
        • 2.Qe3#
      • 1...Se4!
  • Keys
    • 1.Rg3!
      • threat
        • 2.Sg6#
      • 1...hxg3
        • 2.Qxg3#
      • 1...Scb5
        • 2.Qxf1#
      • 1...Sd5
        • 2.Qxd4#
      • 1...Se6
        • 2.Qxf5#
      • 1...Sa8
        • 2.Qxd4#
      • 1...Sce8
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 10
  • Sets
    • Q(g);N_GUARD::QAR(C),XR(a)
    • R(j);S_CUTQ(g)::QAR(C),XR(a)
    • S(i);P_SPINS(k),S_CUTQ(g)::QAR(C),XR(a)
    • S(k);P_SPINS(i),S_CUTQ(g)::QAR(C),XR(a)
    • S(k);P_SPINS(i),S_CUTB(l)::QAR1(C),XP(f)
    • P(e);N_GUARD::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK,XP(c)
      • Vars
        • K(d);P-FLIGHT::QAR1(C)
      • Refutation
        • S(i);P_SPINS(i)
  • Actual
    • R(E);
    • Threat
      • S(D)
    • Vars
      • P(e);OGATE,XR(E)::QAB1(C),XP(e)
      • S(k);P_PINS(D),P_SPINS(i),S_CUTQ(g)::QAR(C),XR(a)
      • S(k);P_PINS(D),P_SPINS(i)::QAR2(C),XP(c)
      • S(k);P_PINS(D),P_SPINS(i),S_CUTB(l)::QAR1(C),XP(f)
HTML5 logo

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).