MESON Chess Problem Database

Problem Display
PID: 228833 (K7/2b5/n2p4/8/2N5/R1Q5/qP6/k2r4 w - - 0 1)

Kauder, Jiri

Sachovy Svet, 1926

K7/2b5/n2p4/8/2N5/R1Q5/qP6/k2r4

#2

5 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qxc1#
    • 1...Re1
      • 2.Qxe1#
    • 1...Rd2
      • 2.Qc1#
    • 1...Rd3
      • 2.Qc1#
    • 1...Rd4
      • 2.Qc1#
    • 1...Rd5
      • 2.Qc1#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qxd1#
        • 2.Qxa2#
      • 1...Kb1
        • 2.Qxd1#
      • 1...Rb1
        • 2.Rxa2#
        • 2.Qxa2#
      • 1...Rc1
        • 2.Qxa2#
      • 1...Re1
        • 2.Qxa2#
      • 1...Rf1
        • 2.Qxa2#
      • 1...Rg1
        • 2.Qxa2#
      • 1...Rh1
        • 2.Qxa2#
      • 1...Rd2
        • 2.Qxa2#
      • 1...Rd3
        • 2.Qxa2#
      • 1...Rd4
        • 2.Qxa2#
      • 1...Rd5
        • 2.Qxa2#
      • 1...Sb4
        • 2.Qxd1#
      • 1...Qxa3!
  • Keys
    • 1.Sd2!
      • threat
        • 2.b3#
        • 2.b4#
      • 1...Qxa3
        • 2.Qxa3#
      • 1...Rxd2
        • 2.Qc1#
      • 1...Rb1
        • 2.Sb3#
      • 1...Rc1
        • 2.Qxc1#
      • 1...Ba5
        • 2.b4#
      • 1...Sb4
        • 2.b3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::QAR2(C),XR(b)
    • R(b);OGATEB::QAR(C),XR(b)
    • R(b);N_GUARD::QAR2(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);N_SPINQ(c),P-FLIGHT::QAR2(C),XR(b)
        • R(b);::QAR1(C),XQ(c)
        • R(b);SBLOCK::QAR1(C),XQ(c)
        • S(d);P_PINR(B)::QAR(C),XR(b)
      • Refutation
        • Q(c);N_SPINQ(c),XR(B)
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • Q(c);N_SPINQ(c),OGATE,XR(B)::QAR2(C),XQ(c)
      • R(b);N_GUARD,XS(D)::QAR2(C)
      • R(b);SBLOCK::S(D)
      • R(b);N_GUARD::QAR2(C),XR(b)
      • B(f);::QAB(C)+P(A)
      • S(d);P_PINR(B)::QAB(C)+P(A)
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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).