MESON Chess Problem Database

Problem Display
PID: 194914 (6r1/5r1n/4Np2/7b/1R3Rqk/1P6/6Q1/2B3K1 w - - 0 1)

Jordan, Gijsbertus

L'Italia Scacchistica, 1918

6r1/5r1n/4Np2/7b/1R3Rqk/1P6/6Q1/2B3K1

#2

7 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Qxg4#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Qh1#
        • 2.Qh2#
        • 2.Qg3#
      • 1...Bg6
        • 2.Qh1#
        • 2.Qh2#
        • 2.Qxg4#
      • 1...Sg5
        • 2.Qg3#
      • 1...Qxf4+!
    • 1.Kh2?
      • threat
        • 2.Qh3#
        • 2.Qf2#
        • 2.Qg3#
      • 1...Bg6
        • 2.Qh3#
        • 2.Qxg4#
      • 1...Sg5
        • 2.Qf2#
        • 2.Qg3#
      • 1...Qxf4+!
    • 1.Bd2?
      • threat
        • 2.Be1#
      • 1...Bg6
        • 2.Qxg4#
      • 1...Qxf4!
    • 1.Be3?
      • threat
        • 2.Bf2#
      • 1...Bg6
        • 2.Qxg4#
      • 1...Qxf4!
    • 1.Rf3?
      • threat
        • 2.Rh3#
        • 2.Qg3#
      • 1...Qxb4
        • 2.Rh3#
      • 1...Bg6
        • 2.Rh3#
        • 2.Qxg4#
      • 1...Sg5
        • 2.Qg3#
      • 1...Qc4
        • 2.Rh3#
      • 1...Qe4
        • 2.Rh3#
      • 1...Qf4
        • 2.Rh3#
      • 1...Qd4+!
    • 1.Rxg4+?
      • 1...Bxg4
        • 2.Qh2#
      • 1...Rxg4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sf3#
      • 1...Kg5
        • 2.Rxg4#
      • 1...Qxf4
        • 2.Sf5#
      • 1...Bg6
        • 2.Qxg4#
      • 1...Sg5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD,S_CUTR(g)::QAR1(C),XQ(a)
  • Tries
    • Try
      • K(B);N_SPINQ(C),S_FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • S(f);::QAB1(C)
      • Refutation
        • Q(a);CHECK,XR(F)
    • Try
      • K(B);N_SPINQ(C),S_FLIGHT
      • Threat
        • DUALS(3)
      • Refutation
        • Q(a);CHECK,XR(F)
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • B(c);N_GUARD,S_CUTR(g)::QAR1(C),XQ(a)
      • Refutation
        • Q(a);XR(F)
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • B(c);N_GUARD,S_CUTR(g)::QAR1(C),XQ(a)
      • Refutation
        • Q(a);XR(F)
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);N_SPINQ(a),XR(E)::R1(F)
        • S(f);::QAB1(C)
        • Q(a);::R1(F)
      • Refutation
        • Q(a);CHECK
    • Try
      • R(F);CHECK,N_SPINQ(C),XQ(a)
      • Vars
        • B(c);P_SPINB(c),XR(F)::QAR2(C)
      • Refutation
        • R(g);P_PINQ(C),P_SPINR(g),XR(F)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(b);S_FLIGHT::B(A)+R(F),DCHECK,XQ(a)
      • Q(a);N_SPINQ(a),XR(F)::S(G)
      • B(c);N_GUARD,S_CUTR(g)::QAR1(C),XQ(a)
      • S(f);SBLOCK::S(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).