MESON Chess Problem Database

Problem Display
PID: 271814 (1Q1r4/3Pp2B/2P1p2n/KPN1Rr2/2Pk1P2/1P4p1/n1pP1q2/1N1R2B1 w - - 0 1)

Markovtsy, Vassyl Yuriovich

Pat a Mat, 2000

1Q1r4/3Pp2B/2P1p2n/KPN1Rr2/2Pk1P2/1P4p1/n1pP1q2/1N1R2B1

#2

15 + 10

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Bxe3#
      • 2.dxe3#
    • 1...Rxf4
      • 2.Sxe6#
    • 1...Rxe5
      • 2.Qxe5#
    • 1...Rg5
      • 2.Sxe6#
    • 1...Rh5
      • 2.Sxe6#
    • 1...Rf7
      • 2.Sxe6#
    • 1...Rff8
      • 2.Sxe6#
    • 1...Sc3
      • 2.dxc3#
    • 1...g2
      • 2.Bxf2#
  • Tries
    • 1.Bxf5?
      • threat
        • 2.Sxe6#
      • 1...exf5
        • 2.Rd5#
      • 1...Sxf5!
    • 1.Rd5+?
      • 1...Rxd5
        • 2.Sxe6#
      • 1...exd5!
  • Keys
    • 1.Re3!
      • threat
        • 2.Sxe6#
      • 1...Qxd2+
        • 2.Rc3#
      • 1...Kxc5
        • 2.d4#
      • 1...Qxe3
        • 2.Bxe3#
      • 1...Rxc5
        • 2.Rd3#
      • 1...Re5
        • 2.Qxe5#
      • 1...Rf6
        • 2.Qe5#
      • 1...e5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • R(f);XP(G)::S(J),XP(g)
    • R(f);OGATE,XR(K)::QAB1(O),XR(f)
    • R(f);::S(J),XP(g)
    • S(a);OGATE::R(B)+P(D)DCHECK,XS(a)
    • P(d);N_GUARD::B(C),XQ(c)
  • Tries
    • Try
      • B(N);XR(f)
      • Threat
        • S(J),XP(g)
      • Vars
        • P(g);N_GUARD,XB(N)::R1(K)
      • Refutation
        • S(h);XB(N)
    • Try
      • R(K);CHECK
      • Vars
        • R(f);XR(K)::S(J),XP(g)
      • Refutation
        • P(g);XR(K)
  • Actual
    • R(K);N_PINQ(c)
    • Threat
      • S(J),XP(g)
    • Vars
      • Q(c);CHECK,OGATEB,P_SPINQ(c),XP(D)::B(C)+R(K)
      • K(e);OGATE,S_FLIGHT,XS(J)::P(D)
      • Q(c);OGATE,P_SPINQ(c),XR(K)::B(C),XQ(c)
      • R(f);P_PINP(I),SBLOCK,XS(J)::R1(K)
      • R(f);N_GUARD::QAB1(O),XR(f)
      • R(f);N_GUARD::QAB1(O)
      • P(g);::S(J)
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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).