MESON Chess Problem Database

Problem Display
PID: 99595 (4BB2/1K1N1p2/1nppk2N/1QR5/p6p/3p4/5rn1/4q2b w - - 0 1)

Overkamp, Petrus

Pest megyei Sakkszovetseg, 1966

4BB2/1K1N1p2/1nppk2N/1QR5/p6p/3p4/5rn1/4q2b

#2

7 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...dxc5
      • 2.Qxc6#
    • 1...d5
      • 2.Rxc6#
      • 2.Qxc6#
  • Tries
    • 1.Re5+?
      • 1...dxe5
        • 2.Qxc6#
      • 1...Qxe5!
    • 1.Rxc6?
      • threat
        • 2.Rxd6#
      • 1...Qb4
        • 2.Qe5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Se3
        • 2.Qe5#
      • 1...Sf4
        • 2.Qf5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc8
        • 2.Qc4#
      • 1...Qe4!
  • Keys
    • 1.Qxc6!
      • threat
        • 2.Qxd6#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qe5
        • 2.Rxe5#
      • 1...Se3
        • 2.Re5#
      • 1...Sf4
        • 2.Bxf7#
      • 1...Sc4
        • 2.Qd5#
      • 1...Sc8
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(j);OGATEB,XR(B)::QAR2(A),XP(i)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • P(j);S_CUTQ(a),XR(B)::QAR2(A),XP(i)
      • Refutation
        • Q(a);XR(B)
    • Try
      • R(B);P_PINP(j),XP(i)
      • Threat
        • R1(B),XP(j)
      • Vars
        • Q(a);N_GUARD::QAR1(A)
        • Q(a);N_GUARD::QAR1(A),XQ(a)
        • S(d);P_PINR(B),S_CUTQ(a)::QAR1(A)
        • S(d);P_PINR(B),S_CUTR(c)::QAB1(A)
        • S(h);N_GUARD::QAB(A),XS(h)
        • S(h);N_GUARD::QAB(A)
      • Refutation
        • Q(a);P_PINR(B)
  • Actual
    • Q(A);P_PINP(j),XP(i)
    • Threat
      • QAR1(A),XP(j)
    • Vars
      • Q(a);N_GUARD,P_PINQ(A)::QAR2(A),XQ(a)
      • Q(a);N_GUARD::R1(B),XQ(a)
      • S(d);P_PINQ(A),S_CUTQ(a)::R1(B)
      • S(d);P_PINQ(A),S_CUTR(c)::B(F),XP(l)
      • S(h);N_GUARD::QAB1(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).