MESON Chess Problem Database

Problem Display
PID: 266451 (8/1p1Q4/2p1nPNK/n2r3p/RBqk4/R3NP2/1p3P2/1Bb5 w - - 0 1)

Pries, Albert

Probleemblad, 1950

8/1p1Q4/2p1nPNK/n2r3p/RBqk4/R3NP2/1p3P2/1Bb5

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Rd3#
    • 1...Qd3
      • 2.Rxd3#
    • 1...Qc5
      • 2.Bc3#
      • 2.Rd3#
    • 1...Bxe3+
      • 2.fxe3#
    • 1...Sf4
      • 2.Sf5#
    • 1...Sc5
      • 2.Bc3#
    • 1...Sg5
      • 2.Sf5#
    • 1...c5
      • 2.Bc3#
  • Tries
    • 1.Be7?
      • threat
        • 2.Rd3#
      • 1...Bxe3+
        • 2.fxe3#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Sb3
        • 2.Rxc4#
      • 1...Sf4
        • 2.Sc2#
        • 2.Sf5#
      • 1...Sc5!
    • 1.Qxd5+?
      • 1...Qxd5
        • 2.Rd3#
      • 1...cxd5!
  • Keys
    • 1.Bd6!
      • threat
        • 2.Rd3#
      • 1...Bxe3+
        • 2.fxe3#
      • 1...Rxd6
        • 2.Qxd6#
      • 1...Sb3
        • 2.Rxc4#
      • 1...Sf4
        • 2.Sc2#
      • 1...Sc5
        • 2.Be5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::R1(C)
    • Q(c);N_GUARD::R1(C),XQ(c)
    • B(a);CHECK,OGATE,XS(D)::P(B),XB(a)
    • S(i);N_PINS(D)::S(D)
    • S(i);SBLOCK::B(G)
    • P(h);SBLOCK::B(G)
  • Tries
    • Try
      • B(G);P_PINQ(c)
      • Threat
        • R1(C)
      • Vars
        • B(a);CHECK,OGATE,XS(D)::P(B),XB(a)
        • R(f);OGATEB::QAR2(K),XR(f)
        • S(e);N_GUARD::R1(F),XQ(c)
      • Refutation
        • S(i);
    • Try
      • Q(K);CHECK,XR(f)
      • Vars
        • Q(c);XQ(K)::R1(C)
      • Refutation
        • P(h);XQ(K)
  • Actual
    • B(G);N_PINR(f),P_PINQ(c)
    • Threat
      • R1(C)
    • Vars
      • B(a);CHECK,OGATE,XS(D)::P(B),XB(a)
      • R(f);OGATE,P_SPINR(f),XB(G)::QAR2(K),XR(f)
      • S(e);N_GUARD::R1(F),XQ(c)
      • S(i);N_PINS(D)::S(D)
      • S(i);SBLOCK::B(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).