MESON Chess Problem Database

Problem Display
PID: 254379 (8/Brn5/q2bP1K1/1nr1RBp1/R1Pk1p1Q/2pN1p2/P1p2P2/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

Problemas, 2021

8/Brn5/q2bP1K1/1nr1RBp1/R1Pk1p1Q/2pN1p2/P1p2P2/8

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.cxb5#
    • 1...Bxe5
      • 2.Bxc5#
    • 1...Sd5
      • 2.Rxd5#
    • 1...Sxe6
      • 2.Rd5#
    • 1...Sa8
      • 2.Rd5#
    • 1...Se8
      • 2.Rd5#
  • Tries
    • 1.Sc1?
      • threat
        • 2.Re4#
      • 1...Kxe5
        • 2.Qh8#
      • 1...Bxe5
        • 2.Sb3#
      • 1...Qc6!
    • 1.Se1?
      • threat
        • 2.Sxf3#
        • 2.Re4#
      • 1...Kxe5
        • 2.Sxf3#
        • 2.Qh8#
      • 1...Qxa4
        • 2.Re4#
      • 1...Bxe5
        • 2.Sxc2#
        • 2.Sxf3#
      • 1...g4
        • 2.Re4#
      • 1...Qc6!
    • 1.Sxf4?
      • threat
        • 2.Re4#
      • 1...Kxe5
        • 2.Sd3#
      • 1...Bxe5
        • 2.Se2#
      • 1...gxf4
        • 2.Qxf4#
      • 1...Qc6!
    • 1.Qh8?
      • threat
        • 2.Rd5#
      • 1...Bxe5
        • 2.Bxc5#
        • 2.Qxe5#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Qxa4!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Re4#
      • 1...Kxc4
        • 2.Sxa6#
      • 1...Kxe5
        • 2.Qh8#
      • 1...Bxe5
        • 2.Sxc2#
      • 1...Qc6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(i);N_GUARD::R(D)+P(E),XS(f)
    • B(j);N_GUARD,P_PINP(I),XR(G)::B(K),XR(g)
    • S(l);N_GUARD::R1(G),XS(l)
    • S(l);N_GUARD,XP(I)::R1(G)
    • S(l);N_GUARD::R1(G)
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(G)
      • Vars
        • K(d);N_SPINP(e),N_SPINR(g),OGATEB,S_FLIGHT,XR(G)::QAB(F)
        • B(j);P_PINP(I),SBLOCK,XR(G)::S(C)
      • Refutation
        • Q(i);
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);XR(D)::R1(G)
        • P(h);N_SPINP(e)::R1(G)
      • Refutation
        • Q(i);
    • Try
      • S(C);XP(e)
      • Threat
        • R1(G)
      • Vars
        • K(d);N_SPINR(g),S_CUTP(h),S_CUTP(h),S_FLIGHT,XR(G)::S(C)
        • B(j);P_PINP(I),SBLOCK,XR(G)::QAR(F)+S(C),DCHECK
        • P(h);OGATE,P_SPINP(h),XS(C)::QAR2(F),XP(h)
      • Refutation
        • Q(i);
    • Try
      • Q(F);N_PINP(e)
      • Threat
        • QAB(F)+R(G),DCHECK
      • Vars
        • S(l);::QAB(F)+R(G),DCHECK,XS(l)
      • Refutation
        • Q(i);XR(D)
  • Actual
    • S(C);
    • Threat
      • R1(G)
    • Vars
      • K(d);N_SPINR(g),P-FLIGHT,XP(E)::R(D)+S(C),XQ(i)
      • K(d);N_SPINP(e),N_SPINR(g),OGATEB,S_FLIGHT,XR(G)::QAB(F)
      • B(j);P_PINP(I),SBLOCK,XR(G)::S(C),XP(a)
      • Q(i);N_GUARD::S(C),XQ(i)
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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).