MESON Chess Problem Database

Problem Display
PID: 263048 (2b2bB1/1p1P4/1Rp2Q2/P1kp4/5pN1/P3qp1K/1nPN1B2/8 w - - 0 1)

Shanshin, Valery Yurevich

Vasilenko, Anatoly Grigorovich

1st Prize, SuperProblem, 2019

2b2bB1/1p1P4/1Rp2Q2/P1kp4/5pN1/P3qp1K/1nPN1B2/8

#2

11 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Bxd4#
      • 2.Qxf8#
    • 1...Sc4
      • 2.Sb3#
  • Tries
    • 1.Se4+?
      • 1...dxe4
        • 2.Qe5#
      • 1...Kc4!
    • 1.Bxe3+?
      • 1...d4
        • 2.Sb3#
        • 2.Se4#
        • 2.Bxd4#
        • 2.Qxd4#
        • 2.Qe5#
        • 2.Qxf8#
      • 1...fxe3!
    • 1.Rb4?
      • threat
        • 2.Sb3#
        • 2.Qxf8#
      • 1...Bd6
        • 2.Sb3#
      • 1...Bh6
        • 2.Sb3#
        • 2.Qe7#
      • 1...Be7
        • 2.Sb3#
        • 2.Qxe7#
      • 1...Bg7
        • 2.Sb3#
        • 2.Qe7#
      • 1...Sc4
        • 2.Sb3#
      • 1...d4!
    • 1.Rb5+?
      • 1...cxb5
        • 2.Qb6#
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Kxb5!
    • 1.Qxf4?
      • threat
        • 2.Sb3#
        • 2.Qb4#
      • 1...Qd4
        • 2.Bxd4#
        • 2.Qxf8#
      • 1...Sd3
        • 2.Sb3#
      • 1...Sc4
        • 2.Sb3#
      • 1...d4!
    • 1.c3?
      • threat
        • 2.Qxf8#
      • 1...d4
        • 2.Sb3#
      • 1...Bh6
        • 2.Qe7#
      • 1...Be7
        • 2.Qxe7#
      • 1...Bg7
        • 2.Qe7#
      • 1...Sc4
        • 2.Sb3#
      • 1...Bd6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sb3#
      • 1...Bxd7+
        • 2.Sxd7#
      • 1...Kd4
        • 2.Sd3#
      • 1...d4
        • 2.Qxf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);SBLOCK::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(f);XS(B)::QAR2(I)
      • Refutation
        • K(e);N_SPINQ(b),P-FLIGHT,P_SPINP(f)
    • Try
      • B(C);CHECK,XQ(b)
      • Refutation
        • P(d);XB(C)
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(j);::S(B)
        • S(a);::S(B)
      • Refutation
        • P(f);N_SPINQ(b)
    • Try
      • R(H);CHECK
      • Refutation
        • K(e);N_SPINQ(b),P-FLIGHT,XR(H)
    • Try
      • Q(I);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::S(B)
      • Refutation
        • P(f);N_SPINQ(b)
    • Try
      • P(A);
      • Threat
        • QAB(I),XB(j)
      • Vars
        • P(f);N_SPINQ(b)::S(B)
        • B(j);N_GUARD::QAB(I)
        • B(j);N_GUARD::QAB(I),XB(j)
        • S(a);SBLOCK::S(B)
      • Refutation
        • B(j);
  • Actual
    • S(F);P_SPINP(J)
    • Threat
      • S(B)
    • Vars
      • B(i);CHECK,XP(J)::S(F),XB(i)
      • K(e);S_CUTS(a),S_FLIGHT::QAB(I)+S(F)
      • P(f);N_SPINQ(b),SBLOCK::QAB(I),XB(j)
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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).