MESON Chess Problem Database

Problem Display
PID: 81956 (1n6/1Kp4Q/p3pPB1/3pk1P1/1B1pN1R1/5p2/2r5/5bn1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Sachove umeni (Ceskoslovensky sach), 1963

1n6/1Kp4Q/p3pPB1/3pk1P1/1B1pN1R1/5p2/2r5/5bn1

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qh2#
    • 1...Ra2
      • 2.Qxc7#
    • 1...Rb2
      • 2.Qxc7#
    • 1...Rd2
      • 2.Qxc7#
    • 1...Re2
      • 2.Qxc7#
    • 1...Rf2
      • 2.Qxc7#
    • 1...Rg2
      • 2.Qxc7#
    • 1...Rh2
      • 2.Qxh2#
      • 2.Qxc7#
    • 1...Rc3
      • 2.Qh2#
    • 1...Rc4
      • 2.Qh2#
    • 1...Rc5
      • 2.Qh2#
    • 1...Rc6
      • 2.Qh2#
    • 1...Be2
      • 2.Qh2#
    • 1...Bg2
      • 2.Qh2#
    • 1...Bc4
      • 2.Qxc7#
    • 1...Sc6
      • 2.Qxc7#
    • 1...f2
      • 2.Qh2#
    • 1...c5
      • 2.Qc7#
    • 1...c6
      • 2.Bd6#
      • 2.Qc7#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qh2#
      • 1...Rxd2
        • 2.Qxc7#
      • 1...Se2
        • 2.Sxf3#
      • 1...Sh3
        • 2.Sxf3#
      • 1...Bh3!
    • 1.Sf2?
      • threat
        • 2.Qh2#
      • 1...Rxf2
        • 2.Qxc7#
      • 1...Bh3
        • 2.Sd3#
      • 1...Se2
        • 2.Sd3#
      • 1...Sh3!
    • 1.Sc3?
      • threat
        • 2.Qxc7#
      • 1...Rxc3
        • 2.Qh2#
      • 1...c5
        • 2.Qc7#
      • 1...c6
        • 2.Qc7#
      • 1...Sd7!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qxc7#
      • 1...Kd6
        • 2.Qxc7#
      • 1...Rxc5
        • 2.Qh2#
      • 1...Sd7
        • 2.Sxd7#
      • 1...c6
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 16
  • Sets
    • R(c);N_GUARD::QAB(H)
    • R(c);N_GUARD::QAB(H),XP(j)
    • R(c);N_GUARD,P_PINB(A)::QAB(H),XP(j)
    • B(a);S_CUTR(c)::QAB(H)
    • B(a);S_CUTR(c)::QAB(H),XP(j)
    • S(k);S_CUTR(c)::QAB(H),XP(j)
    • P(d);S_CUTR(c)::QAB(H)
    • P(j);S_CUTR(c)::QAB(H)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB(H)
      • Vars
        • R(c);N_GUARD,XS(B)::QAB(H),XP(j)
        • S(b);N_GUARD::S(B),XP(d)
      • Refutation
        • B(a);
    • Try
      • S(B);
      • Threat
        • QAB(H)
      • Vars
        • R(c);N_GUARD,XS(B)::QAB(H),XP(j)
        • B(a);N_GUARD::S(B)
        • S(b);S_CUTB(a)::S(B)
      • Refutation
        • S(b);
    • Try
      • S(B);
      • Threat
        • QAB(H),XP(j)
      • Vars
        • R(c);N_GUARD,XS(B)::QAB(H)
        • P(j);::QAB(H)
      • Refutation
        • S(k);
  • Actual
    • S(B);
    • Threat
      • QAB(H),XP(j)
    • Vars
      • K(g);S_FLIGHT::QAB1(H),XP(j)
      • R(c);N_GUARD,XS(B)::QAB(H)
      • S(k);N_GUARD::S(B),XS(k)
      • P(j);::QAB(H)
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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).