MESON Chess Problem Database

Problem Display
PID: 164633 (6K1/1P1pR3/r2p4/1PPk1p2/4R3/1p6/2b3Q1/2b3B1 w - - 0 1)

Dyachuk, Vasyl Vasilovich

4th Prize, Zadachi i Etyudi, 2014

6K1/1P1pR3/r2p4/1PPk1p2/4R3/1p6/2b3Q1/2b3B1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8+
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...f4
      • 2.Qg5#
    • 1...dxc5
      • 2.Rd4#
  • Tries
    • 1.Qd2+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bxd2!
    • 1.Qf2?
      • threat
        • 2.Qd4#
        • 2.Qxf5#
      • 1...Ra8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Bxe4
        • 2.Qd4#
      • 1...fxe4
        • 2.Qd4#
        • 2.Qf7#
      • 1...dxc5
        • 2.Qxc5#
      • 1...Be3
        • 2.Qxf5#
      • 1...Ra4
        • 2.Qxf5#
      • 1...Bf4
        • 2.Qd4#
      • 1...f4
        • 2.Qd4#
      • 1...Bb2!
    • 1.Qg7?
      • threat
        • 2.Qd4#
        • 2.Qf7#
      • 1...Ra8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...dxc5
        • 2.Qe5#
      • 1...Ra4
        • 2.Qf7#
      • 1...Bb2
        • 2.Qf7#
      • 1...Be3!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qxf5#
        • 2.Qf7#
      • 1...Ra8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Bxe4
        • 2.Qf7#
      • 1...fxe4
        • 2.Qf7#
      • 1...dxc5
        • 2.R7e5#
      • 1...Be3
        • 2.Qxf5#
      • 1...Bb2
        • 2.Qf7#
      • 1...Bf4
        • 2.Qf7#
      • 1...f4
        • 2.Qf5#
        • 2.Qh5#
        • 2.Qf7#
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(f);CHECK,OGATE::PXR(f)=Q
    • P(e);OGATEB::QAR(B)
    • P(g);SBLOCK,XP(E)::QAB(B)+R(C),DCHECK
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(B),XB(b)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);CHECK,OGATE::PXR(f)=Q
        • B(b);XR(C)::QAR1(B)
        • P(g);OGATE,XP(E)::QAR1(B),XP(g)
        • B(a);::QAR2(B),XP(e)
        • R(f);::QAR2(B),XP(e)
        • B(a);::QAR1(B)
        • P(e);::QAR1(B)
      • Refutation
        • B(a);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);CHECK,OGATE::PXR(f)=Q
        • P(g);N_GUARD,XP(E)::QAR1(B)
        • R(f);::QAB(B)
        • B(a);::QAB(B)
      • Refutation
        • B(a);
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • R(f);CHECK,OGATE::PXR(f)=Q
      • B(b);XR(C)::QAB(B)
      • P(e);XR(C)::QAB(B)
      • P(g);N_GUARD,XP(E)::R1(G)
      • B(a);::QAR2(B),XP(e)
      • B(a);::QAB(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).