MESON Chess Problem Database

Problem Display
PID: 224559 (8/2bRp3/1p1q2p1/2P1k1P1/N1B3P1/3P4/2NQ3K/3n4 w - - 0 1)

Liberali, Giuseppe

Nashville Daily American, 1888

8/2bRp3/1p1q2p1/2P1k1P1/N1B3P1/3P4/2NQ3K/3n4

#2

10 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3
      • 2.Rxe7#
    • 1...Qd4
      • 2.Rxe7#
    • 1...Sb2
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
  • Tries
    • 1.Rxe7+?
      • 1...Qe6
        • 2.Rxe6#
      • 1...Qxe7!
    • 1.Qe1+?
      • 1...Se3
        • 2.Qg3#
        • 2.Qxe3#
      • 1...Kf4!
    • 1.Qe2+?
      • 1...Se3
        • 2.Qxe3#
      • 1...Kf4!
    • 1.d4+?
      • 1...Qxd4
        • 2.Rxe7#
        • 2.Qxd4#
      • 1...Ke4+!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sf3#
      • 1...Kxd4+
        • 2.Qf4#
      • 1...Qxd4
        • 2.Rxe7#
      • 1...Se3
        • 2.Qxe3#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Qf6
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(d);N_GUARD,XP(D)::R(J),XP(g)
    • Q(d);N_GUARD::R(J),XP(g)
    • S(a);N_GUARD::QAR2(B)
    • S(a);N_GUARD::QAR2(B),XS(a)
  • Tries
    • Try
      • R(J);CHECK,XP(g)
      • Vars
        • Q(d);N_GUARD,P_SPINQ(d)::R1(J),XQ(d)
      • Refutation
        • Q(d);XR(J)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(D);CHECK
      • Refutation
        • K(b);CHECK,P-FLIGHT
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(b);CHECK,P_SPINQ(d),S_FLIGHT,XS(A)::QAR2(B)
      • Q(d);N_GUARD,SBLOCK,XS(A)::R(J),XP(g)
      • S(a);N_GUARD::QAR2(B),XS(a)
      • Q(d);OGATE::R1(J),XQ(d)
      • Q(d);N_GUARD::S(A),XQ(d)
      • Q(d);OGATE::R1(J)
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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).