MESON Chess Problem Database

Problem Display
PID: 268595 (2RNR2b/3K4/5P2/Pp1k1pP1/1p1p1p2/2pqp2b/1P6/1rrQ4 w - - 0 1)

Murashev, Pavel Aleksandrovich

Best Problems, 2023

2RNR2b/3K4/5P2/Pp1k1pP1/1p1p1p2/2pqp2b/1P6/1rrQ4

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qf3#
    • 1...Qe4
      • 2.Qb3#
    • 1...Qd2
      • 2.Qb3#
      • 2.Qf3#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Sxb4#
      • 1...Kc4
        • 2.Se7#
      • 1...Kc5
        • 2.Se7#
      • 1...Qc4
        • 2.Re5#
      • 1...b3
        • 2.Sb4#
      • 1...Rxb2!
    • 1.Sb7?
      • threat
        • 2.Rc5#
      • 1...Qc4
        • 2.Qf3#
      • 1...cxb2!
    • 1.Sf7?
      • threat
        • 2.Re5#
      • 1...Qe4
        • 2.Qb3#
      • 1...Bxf6!
    • 1.Qxd3?
      • threat
        • 2.Qxb5#
      • 1...Bf1
        • 2.Qxf5#
      • 1...cxb2!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sxf4#
      • 1...Ke4
        • 2.Sc7#
      • 1...Ke5
        • 2.Sc7#
      • 1...Qf1
        • 2.Qxd4#
      • 1...Qe4
        • 2.Rc5#
      • 1...f3
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(d);N_GUARD,P_SPINP(h)::QAB(A)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H),XP(g)
      • Vars
        • K(k);N_GUARD,S_FLIGHT::R(G)+S(H)
        • K(k);N_GUARD,P-FLIGHT::R(G)+S(H)
        • Q(d);P_SPINP(h),SBLOCK::R1(I)
        • P(g);::S(H)
      • Refutation
        • R(a);XP(B)
    • Try
      • S(H);
      • Threat
        • R1(G)
      • Vars
        • Q(d);N_GUARD,P_SPINP(h)::QAB(A)
      • Refutation
        • P(c);XP(B)
    • Try
      • S(H);
      • Threat
        • R1(I)
      • Vars
        • Q(d);N_GUARD,P_SPINP(h)::QAB(A)
      • Refutation
        • B(m);XP(E)
    • Try
      • Q(A);P_PINP(h),XQ(d)
      • Threat
        • QAR2(A),XP(j)
      • Vars
        • B(f);N_GUARD::QAR2(A),XP(l)
      • Refutation
        • P(c);XP(B)
  • Actual
    • S(H);
    • Threat
      • S(H),XP(i)
    • Vars
      • K(k);N_GUARD,S_FLIGHT::R(I)+S(H)
      • K(k);N_GUARD,P-FLIGHT::R(I)+S(H)
      • Q(d);OGATE,P_SPINP(h)::QAR1(A),XP(h)
      • Q(d);P_SPINP(h),SBLOCK::R1(G)
      • P(i);::S(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).