MESON Chess Problem Database

Problem Display
PID: 273297 (1n6/1K6/2p2R1p/b1k3rR/Q2NP3/2p2Np1/5r2/nb4B1 w - - 0 1)

Petrov, Evgeny Aleksandrovich

Schakend Nederland, 1977

1n6/1K6/2p2R1p/b1k3rR/Q2NP3/2p2Np1/5r2/nb4B1

#2

8 + 11

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Sb3#
    • 1...Ra2
      • 2.Sc2#
      • 2.Se2#
      • 2.Sb3#
    • 1...Rb2+
      • 2.Sb3#
    • 1...Rc2
      • 2.Sxc2#
      • 2.Se2#
      • 2.Sb3#
    • 1...Rd2
      • 2.Sb3#
    • 1...Re2
      • 2.Sxe2#
      • 2.Sb3#
    • 1...Rg2
      • 2.Sb3#
    • 1...Rh2
      • 2.Sb3#
    • 1...Rxf3
      • 2.Sb3#
      • 2.Sxf3#
    • 1...Re5
      • 2.Rxe5#
    • 1...Rf5
      • 2.Rhxf5#
    • 1...Sc2
      • 2.Sb3#
    • 1...Sb3
      • 2.Sxb3#
    • 1...Sa6
      • 2.Rxc6#
    • 1...Sd7
      • 2.Rxc6#
  • Keys
    • 1.Se5!
      • threat
        • 2.Qc4#
      • 1...Rb2+
        • 2.Sb3#
      • 1...Rg7+
        • 2.Sd7#
      • 1...Rxf6
        • 2.Sf5#
      • 1...Rxe5
        • 2.Rxe5#
      • 1...Bb4
        • 2.Qa7#
      • 1...Ba2
        • 2.Sd3#
      • 1...Bd3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • R(c);::B(A)+S(D),DCHECK
    • R(c);CHECK::B(A)+S(D),DCHECK
    • R(h);OGATE::R(F),XR(h)
    • S(a);N_GUARD::S(D)
    • S(a);N_GUARD::S(D),XS(a)
    • S(k);N_GUARD::R1(G),XP(i)
  • Actual
    • S(B);N_PINR(h)
    • Threat
      • QAR1(C)
    • Vars
      • R(c);CHECK::B(A)+S(D),DCHECK
      • R(h);CHECK::R(F)+S(B),DCHECK
      • R(c);XR(G)::B(A)+S(D)
      • R(h);OGATE,P_SPINR(h),XS(B)::R(F),XR(h)
      • B(f);OGATE,SBLOCK::QAB(C)
      • B(b);N_GUARD::S(B)
      • B(b);N_GUARD::S(B),XB(b)
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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).