MESON Chess Problem Database

Problem Display
PID: 176596 (4b3/p2pb1r1/4Pn2/NRPkBP1n/K1N5/pp6/4R1q1/7B w - - 0 1)

Marysko, Milos

Schach-Echo, 1967

4b3/p2pb1r1/4Pn2/NRPkBP1n/K1N5/pp6/4R1q1/7B

#2

10 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Rd2#
    • 1...Bd6
      • 2.cxd6#
    • 1...Bd8
      • 2.c6#
    • 1...Sg4
      • 2.Bxg2#
    • 1...a6
      • 2.Sb6#
    • 1...d6
      • 2.c6#
  • Tries
    • 1.Bxg2+?
      • 1...Se4
        • 2.Bxe4#
        • 2.Rd2#
      • 1...Rxg2!
    • 1.Ba1?
      • threat
        • 2.Re5#
      • 1...Qe4
        • 2.Rd2#
      • 1...Bd6
        • 2.cxd6#
      • 1...Se4
        • 2.Se3#
      • 1...Sg4
        • 2.Bxg2#
      • 1...d6
        • 2.c6#
      • 1...b2!
    • 1.Bb2?
      • threat
        • 2.Re5#
      • 1...Qe4
        • 2.Rd2#
      • 1...Bd6
        • 2.cxd6#
      • 1...Se4
        • 2.Se3#
      • 1...Sg4
        • 2.Bxg2#
      • 1...d6
        • 2.c6#
      • 1...axb2!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Re5#
      • 1...Qe4
        • 2.Rd2#
      • 1...Bd6
        • 2.cxd6#
      • 1...Se4
        • 2.Se3#
      • 1...Sg4
        • 2.Bxg2#
      • 1...d6
        • 2.c6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(a);P_PINS(D)::R(B)
    • B(i);OGATE::R(F)+P(G),XB(i)
    • B(i);N_GUARD::R(F)+P(G)
    • S(f);N_GUARD,S_CUTR(j)::B(A),XQ(a)
    • P(g);N_GUARD::S(D)
    • P(h);P_PINR(F),S_CUTB(i)::R(F)+P(G)
  • Tries
    • Try
      • B(A);CHECK,XQ(a)
      • Refutation
        • R(j);XB(A)
    • Try
      • B(H);
      • Threat
        • R1(B)
      • Vars
        • Q(a);P_PINS(D)::R(B)
        • B(i);OGATE::R(F)+P(G),XB(i)
        • S(f);N_SPINQ(a),SBLOCK::S(D)
        • S(f);N_GUARD,S_CUTR(j)::B(A),XQ(a)
        • P(h);P_PINR(F),S_CUTB(i)::R(F)+P(G)
      • Refutation
        • P(c);
    • Try
      • B(H);
      • Threat
        • R1(B)
      • Vars
        • Q(a);P_PINS(D)::R(B)
        • B(i);OGATE::R(F)+P(G),XB(i)
        • S(f);N_SPINQ(a),SBLOCK::S(D)
        • S(f);N_GUARD,S_CUTR(j)::B(A),XQ(a)
        • P(h);P_PINR(F),S_CUTB(i)::R(F)+P(G)
      • Refutation
        • P(b);XB(H)
  • Actual
    • B(H);
    • Threat
      • R1(B)
    • Vars
      • Q(a);P_PINS(D)::R(B)
      • B(i);OGATE::R(F)+P(G),XB(i)
      • S(f);N_SPINQ(a),SBLOCK::S(D)
      • S(f);N_GUARD,S_CUTR(j)::B(A),XQ(a)
      • P(h);P_PINR(F),S_CUTB(i)::R(F)+P(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).