MESON Chess Problem Database

Problem Display
PID: 134545 (8/Kp2Q3/1N2p2r/pR1nk2P/8/1nP1b1PB/4RN2/2qr3b w - - 0 1)

Hirschenson, Aaron

5th Place, Liga Problemista, 2008/4

8/Kp2Q3/1N2p2r/pR1nk2P/8/1nP1b1PB/4RN2/2qr3b

#2

10 + 11

273 Mat Plus 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sd7#
    • 1...Rxh5
      • 2.Qxe6#
    • 1...Rf6
      • 2.Qc7#
    • 1...Rh7
      • 2.Qxe6#
    • 1...Rh8
      • 2.Qxe6#
    • 1...Sd4
      • 2.Sc4#
      • 2.Sd7#
    • 1...Sc5
      • 2.Sc4#
  • Tries
    • 1.Rxe3+?
      • 1...Be4
        • 2.Sc4#
        • 2.Sd7#
        • 2.Rxe4#
      • 1...Qxe3!
    • 1.Rc5?
      • threat
        • 2.Sc4#
        • 2.Sd7#
      • 1...Sxc5
        • 2.Sc4#
      • 1...Rd4
        • 2.Sd7#
      • 1...Sd2
        • 2.Sd7#
      • 1...Qxc3!
    • 1.Qg7+?
      • 1...Rf6
        • 2.Qc7#
      • 1...Kd6!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qf4#
      • 1...Rd4
        • 2.Sd7#
      • 1...Rf6
        • 2.Qb8#
      • 1...Be4
        • 2.Sg4#
      • 1...Sc5
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(b);N_PINS(H)::S(H)
    • R(j);N_GUARD,XP(G)::QAR1(J),XP(i)
    • R(j);SBLOCK::QAB(J)
    • R(j);N_GUARD::QAR1(J),XP(i)
    • S(d);N_PINS(H),N_SPINS(g)::S(H)
  • Tries
    • Try
      • R(A);CHECK,N_SPINS(H),XB(e)
      • Refutation
        • Q(a);P_PINS(H),XR(A)
    • Try
      • R(F);N_SPINS(H)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);N_SPINS(g),XR(F)::S(H)
        • R(b);::S(H)
        • S(d);::S(H)
      • Refutation
        • Q(a);XP(C)
    • Try
      • Q(J);CHECK,N_PINP(i)
      • Vars
        • R(j);P_SPINR(j),SBLOCK::QAB(J)
      • Refutation
        • K(h);N_SPINB(e),N_SPINS(g),S_FLIGHT
  • Actual
    • Q(J);N_PINP(i)
    • Threat
      • QAB1(J)
    • Vars
      • R(b);N_PINS(H)::S(H)
      • R(j);SBLOCK::QAB(J)
      • B(c);N_SPINB(e),SBLOCK::S(B)
      • S(d);N_PINS(H),N_SPINS(g)::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).