MESON Chess Problem Database

Problem Display
PID: 72740 (8/5R2/q4p2/1P1Bkn2/pQ3p2/2p1Np1r/K2Nn1r1/2b5 w - - 0 1)

Levman, Semyon Semyonovich

Tijdschrift vd KNSB, 1936

8/5R2/q4p2/1P1Bkn2/pQ3p2/2p1Np1r/K2Nn1r1/2b5

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Qe4#
    • 1...Rh1
      • 2.Sxf3#
    • 1...Rh2
      • 2.Sxf3#
    • 1...Rh4
      • 2.Sxf3#
    • 1...Rh5
      • 2.Sxf3#
    • 1...Rh6
      • 2.Sxf3#
    • 1...Rh7
      • 2.Sxf3#
    • 1...Rh8
      • 2.Sxf3#
    • 1...Sg3
      • 2.Sxf3#
    • 1...Sd4
      • 2.Sdc4#
    • 1...Sd6
      • 2.Re7#
  • Tries
    • 1.Re7+?
      • 1...Qe6
        • 2.Rxe6#
      • 1...Sxe7!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Qe4#
      • 1...Seg3
        • 2.Sg4#
      • 1...Sed4
        • 2.Sc4#
      • 1...Sfg3
        • 2.Sxf3#
      • 1...Sfd4
        • 2.Sdc4#
      • 1...Sd6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(k);SBLOCK::QAR1(D)
    • R(f);N_GUARD::S(B),XP(e)
    • S(j);S_CUTR(f)::S(B),XP(e)
    • S(j);SBLOCK::S(B)
    • S(j);N_GUARD,S_CUTQ(k)::R(G)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • Q(k);N_GUARD,P_PINB(F),P_SPINQ(k)::R1(G),XQ(k)
      • Refutation
        • S(j);XR(G)
  • Actual
    • R(G);
    • Threat
      • QAR1(D)
    • Vars
      • S(b);P_PINS(B),S_CUTR(c)::S(C)
      • S(b);P_PINS(B),SBLOCK::S(C)
      • S(j);S_CUTR(f)::S(B),XP(e)
      • S(j);SBLOCK::S(B)
      • S(j);N_GUARD,S_CUTQ(k)::R(G)
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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).