MESON Chess Problem Database

Problem Display
PID: 78274 (8/3p1r2/Q2Pk1N1/1K2B2R/4n1r1/2ppR1NB/3p4/1b6 w - - 0 1)

Loshinski, Lev Ilich

Umnov, Evgeny Ivanovich

Comm., Abastumansky Shakhmaty Bureau, 1930

8/3p1r2/Q2Pk1N1/1K2B2R/4n1r1/2ppR1NB/3p4/1b6

#2

9 + 9

5314 Grossmeister Shakhmatnoi Kompozitsii 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qxa2#
    • 1...Sxd6+
      • 2.Qxd6#
    • 1...Sf6
      • 2.Sf4#
  • Tries
    • 1.Sf8+?
      • 1...Kd5
        • 2.Qb7#
        • 2.Qa8#
      • 1...Rxf8!
    • 1.Bxg4+?
      • 1...Kd5
        • 2.Qb7#
        • 2.Qa8#
      • 1...Rf5!
    • 1.Qa4?
      • threat
        • 2.Qb3#
        • 2.Qc4#
      • 1...Kd5
        • 2.Qb3#
        • 2.Qc4#
      • 1...d1Q
        • 2.Qc4#
      • 1...d1B
        • 2.Qc4#
      • 1...Ba2
        • 2.Qxa2#
      • 1...Bc2
        • 2.Qc4#
      • 1...Sc5
        • 2.Qc4#
      • 1...Sf6
        • 2.Sf4#
      • 1...Sxd6+!
  • Keys
    • 1.Kb4!
      • threat
        • 2.Qc4#
      • 1...Sxd6+
        • 2.Bd4#
      • 1...Sf6+
        • 2.Sf4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Ba2
        • 2.Qxa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB(G),XB(a)
    • S(e);CHECK,OGATE,P_SPINS(e),XP(H)::QAR1(G),XS(e)
    • S(e);S_CUTR(i)::S(I)
  • Tries
    • Try
      • S(I);CHECK
      • Refutation
        • R(i);XS(I)
    • Try
      • B(C);CHECK,XR(f)
      • Refutation
        • R(i);P_PINB(E),P_SPINR(i)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB(G)
        • B(a);N_GUARD::QAB(G),XB(a)
        • B(a);::QAB(G)
        • S(e);::QAB(G)
        • S(e);S_CUTR(i)::S(I)
      • Refutation
        • S(e);CHECK,XP(H)
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • QAB(G)
    • Vars
      • S(e);CHECK,OGATEB,P_SPINS(e),XP(H)::R(A)+B(E)
      • S(e);CHECK,S_CUTR(i)::S(I)
      • K(g);N_SPINR(f),S_FLIGHT::QAB1(G)
      • B(a);N_GUARD::QAB(G),XB(a)
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).