MESON Chess Problem Database

Problem Display
PID: 202360 (4N2B/qP1B4/P7/RnrkbnRr/1K5p/1Pp1pPpP/3pN3/5Q2 w - - 0 1)

Pasqualini, Giulio

L'Alfiere di Re, 1923

4N2B/qP1B4/P7/RnrkbnRr/1K5p/1Pp1pPpP/3pN3/5Q2

#2

13 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4+
      • 2.bxc4#
    • 1...Bd4
      • 2.Sf4#
    • 1...Bf4
      • 2.Sxf4#
    • 1...Sbd4
      • 2.Sxc3#
    • 1...Sbd6
      • 2.Sc7#
    • 1...Sfd4
      • 2.Sf4#
    • 1...Sfd6
      • 2.Sf6#
  • Tries
    • 1.Sf4+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Bxf4!
    • 1.Qb1?
      • threat
        • 2.Qe4#
      • 1...Rc4+
        • 2.bxc4#
      • 1...Sbd6
        • 2.Sc7#
      • 1...Sfd6
        • 2.Sf6#
      • 1...c2!
  • Keys
    • 1.Qg2!
      • threat
        • 2.f4#
      • 1...Rc4+
        • 2.bxc4#
      • 1...Bf4
        • 2.Sxf4#
      • 1...Sbd4
        • 2.Sxc3#
      • 1...Sbd6
        • 2.Sc7#
      • 1...Sfd4
        • 2.Sf4#
      • 1...Sfd6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(g);CHECK,OGATE,P_SPINS(f)::P(C),XR(g)
    • B(i);N_GUARD,P_SPINS(j)::S(B)
    • B(i);N_GUARD,P_SPINS(j)::S(B),XB(i)
    • S(f);N_GUARD,P_SPINR(g),SBLOCK,S_CUTB(i)::S(B),XP(b)
    • S(f);N_GUARD,P_SPINR(g),SBLOCK,S_CUTB(i)::S(L)
    • S(j);P_SPINB(i),SBLOCK::S(B)
    • S(j);P_SPINB(i),SBLOCK::S(L)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINB(i)::QAR1(A)
      • Refutation
        • B(i);P_SPINS(j),XS(B)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(g);CHECK,OGATE,P_SPINS(f)::P(C),XR(g)
        • S(f);N_GUARD,P_SPINR(g),SBLOCK,S_CUTB(i)::S(L)
        • S(j);P_SPINB(i),SBLOCK::S(L)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+P(D)
    • Vars
      • R(g);CHECK,OGATE,P_SPINS(f)::P(C),XR(g)
      • B(i);N_GUARD,P_SPINS(j)::S(B),XB(i)
      • S(f);N_GUARD,P_SPINR(g),SBLOCK,S_CUTB(i)::S(B),XP(b)
      • S(f);N_GUARD,P_SPINR(g),SBLOCK,S_CUTB(i)::S(L)
      • S(j);P_SPINB(i),SBLOCK::S(B)
      • S(j);P_SPINB(i),SBLOCK::S(L)
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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).