MESON Chess Problem Database

Problem Display
PID: 78273 (4BN2/1p5n/pp6/2pk1K2/1nppRB2/r5p1/r5Q1/1q6 w - - 0 1)

Loshinski, Lev Ilich

Umnov, Evgeny Ivanovich

British Chess Magazine, 1931

4BN2/1p5n/pp6/2pk1K2/1nppRB2/r5p1/r5Q1/1q6

#2

6 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4+
      • 2.Qxe4#
    • 1...Sc2
      • 2.Re3#
    • 1...Sd3
      • 2.Re2#
    • 1...Sc6
      • 2.Bf7#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sc7#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...c3!
    • 1.Sg6?
      • threat
        • 2.Se7#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Sc6
        • 2.Bf7#
      • 1...c3!
    • 1.Sxh7?
      • threat
        • 2.Sf6#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...c3!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sxb6#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Kc6
        • 2.Sf6#
      • 1...Sc2
        • 2.Re3#
      • 1...Sd3
        • 2.Re2#
      • 1...Sc6
        • 2.Bf7#
      • 1...b5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATE,P_SPINQ(a),XR(B)::QAB1(A),XQ(a)
    • S(e);N_PINR(B)::QAB(A)+R(B)
    • S(e);SBLOCK::B(E)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • Q(a);CHECK,OGATE,P_SPINQ(a),XR(B)::QAB1(A),XQ(a)
      • Refutation
        • P(f);
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • Q(a);CHECK,OGATE,P_SPINQ(a),XR(B)::QAB1(A),XQ(a)
        • S(e);SBLOCK::B(E)
      • Refutation
        • P(f);
    • Try
      • S(F);XS(m)
      • Threat
        • S(F)
      • Vars
        • Q(a);CHECK,OGATE,P_SPINQ(a),XR(B)::QAB1(A),XQ(a)
      • Refutation
        • P(f);
  • Actual
    • S(F);
    • Threat
      • S(F),XP(k)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XR(B)::QAB1(A),XQ(a)
      • K(i);S_FLIGHT::B(E)+S(F)
      • S(e);N_PINR(B)::QAB(A)+R(B)
      • S(e);SBLOCK::B(E)
      • P(k);::S(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).