MESON Chess Problem Database

Problem Display
PID: 276972 (B2NK3/2p1Q2p/3ppp2/B1knn1Rr/P1p3b1/2P1rp2/3N4/8 w - - 0 1)

Velasco, Jose Luis

Peris-120 MT (Problemas), 2024

B2NK3/2p1Q2p/3ppp2/B1knn1Rr/P1p3b1/2P1rp2/3N4/8

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Se4#
    • 1...Re4
      • 2.Sxe4#
    • 1...Sf4
      • 2.Qxc7#
    • 1...Sb6
      • 2.Bb4#
      • 2.Qxc7#
    • 1...Sd3
      • 2.Qxc7#
    • 1...Sc6
      • 2.Sb7#
    • 1...Sg6
      • 2.Qxc7#
    • 1...Sf7
      • 2.Qxc7#
    • 1...f5
      • 2.Sxe6#
    • 1...c6
      • 2.Sb7#
  • Tries
    • 1.Qxc7+?
      • 1...Sc6
        • 2.Sb7#
        • 2.Bb4#
        • 2.Bb6#
        • 2.Qb6#
        • 2.Qxc6#
      • 1...Sxc7+!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Qxd5#
      • 1...Bxe6
        • 2.Sxe6#
      • 1...Sxc3
        • 2.Qxc4#
      • 1...Rd3
        • 2.Se4#
      • 1...Sb4
        • 2.Qxc4#
      • 1...Sf4
        • 2.Qxc4#
      • 1...Sb6
        • 2.Bb4#
      • 1...Se7
        • 2.Qxc4#
      • 1...Sd3
        • 2.Qxe3#
      • 1...Sc6
        • 2.Sb7#
      • 1...Sg6
        • 2.Qxe3#
      • 1...Sd7
        • 2.Qxe3#
      • 1...Sf7
        • 2.Qxe3#
      • 1...c6
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::S(A)
    • R(a);N_GUARD::S(A),XR(a)
    • S(f);N_GUARD,P_SPINS(g)::QAR2(F),XP(l)
    • S(g);N_GUARD,P_SPINS(f)::QAR2(F),XP(l)
    • S(g);P_SPINS(f),SBLOCK::S(H)
    • P(k);S_CUTB(d)::S(H),XP(j)
    • P(l);SBLOCK::S(H)
  • Tries
    • Try
      • Q(F);CHECK,N_PINP(i),XP(l)
      • Refutation
        • S(f);CHECK,P_SPINS(g),XQ(F)
  • Actual
    • Q(F);N_PINP(i),XP(j)
    • Threat
      • QAR1(F),XS(f)
    • Vars
      • B(d);XQ(F)::S(H),XB(d)
      • S(f);OGATE,P_SPINS(g),XP(B)::QAR1(F),XP(c)
      • R(a);N_GUARD::S(A)
      • S(f);OGATE,P_SPINS(g)::QAR1(F),XP(c)
      • S(f);N_GUARD,P_SPINS(g),SBLOCK::B(D)
      • S(g);OGATE,P_PINQ(F),P_SPINS(f)::QAB(F),XR(a)
      • S(g);P_PINQ(F),P_SPINS(f),SBLOCK::S(H)
      • P(l);SBLOCK::S(H)
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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).