MESON Chess Problem Database

Problem Display
PID: 263161 (8/B2R3r/1nPNpp2/1PbBqP2/1p1kpRN1/1Q1p1P2/K3b3/8 w - - 0 1)

Markovtsy, Vassyl Yuriovich

SuperProblem, 2021

8/B2R3r/1nPNpp2/1PbBqP2/1p1kpRN1/1Q1p1P2/K3b3/8

#2

12 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Rxe4#
    • 1...Bxd6
      • 2.Qc4#
    • 1...Sa4
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sxd5
      • 2.Qc4#
    • 1...Sxd7
      • 2.Qc4#
    • 1...Sa8
      • 2.Qc4#
    • 1...Sc8
      • 2.Qc4#
    • 1...exd5
      • 2.Qb2#
  • Tries
    • 1.Sf7?
      • threat
        • 2.Qb2#
      • 1...Qxd5
        • 2.Rxe4#
      • 1...Sxd5
        • 2.Qxb4#
      • 1...Sxd7
        • 2.Qc4#
      • 1...Bd6
        • 2.Qc4#
      • 1...Be7
        • 2.Qc4#
      • 1...Bf8
        • 2.Qc4#
      • 1...Qd6
        • 2.Rxe4#
      • 1...Sa4
        • 2.Qc4#
        • 2.Qxb4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...d2
        • 2.Qe3#
      • 1...exd5!
    • 1.fxe4?
      • threat
        • 2.Qb2#
      • 1...Qxe4
        • 2.Rxe4#
      • 1...Qxd5
        • 2.exd5#
      • 1...Bxd6
        • 2.Qc4#
      • 1...Sxd5
        • 2.Qc4#
      • 1...Sa4
        • 2.Qc4#
        • 2.Qxb4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...d2
        • 2.Qe3#
      • 1...Bxg4!
  • Keys
    • 1.Bxe4!
      • threat
        • 2.Qb2#
      • 1...Qxd6
        • 2.Bxd3#
      • 1...Qxe4
        • 2.Rxe4#
      • 1...Bxd6
        • 2.Qxb4#
      • 1...Qd5
        • 2.Bxd5#
      • 1...Sa4
        • 2.Qc4#
        • 2.Qxb4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_GUARD,XS(J)::R1(D),XP(e)
    • B(f);P_SPINS(h),XS(J)::QAR1(B)
    • S(h);N_GUARD,P_SPINB(f)::QAR1(B)
    • S(h);N_GUARD,P_SPINB(f)::QAR1(B),XS(h)
    • S(h);N_GUARD,P_SPINB(f),XB(G)::QAR1(B)
    • S(h);N_GUARD,P_SPINB(f),XR(L)::QAR1(B)
    • P(i);SBLOCK,XB(G)::QAB(B)
  • Tries
    • Try
      • S(J);
      • Threat
        • QAB(B)
      • Vars
        • Q(g);N_GUARD,P_PINQ(B),P_SPINQ(g),XB(G)::R1(D),XP(e)
        • S(h);N_GUARD,P_SPINB(f),P_SPINS(h),XB(G)::QAR2(B),XP(c)
        • S(h);N_GUARD,P_SPINB(f),XR(L)::QAR1(B)
        • B(f);P_SPINS(h)::QAR1(B)
        • Q(g);N_GUARD::R1(D),XP(e)
        • S(h);N_GUARD,P_SPINB(f)::QAR1(B),XS(h)
        • P(b);OGATE::QAB1(B)
      • Refutation
        • P(i);XB(G)
    • Try
      • P(C);XP(e)
      • Threat
        • QAB(B)
      • Vars
        • Q(g);OGATE,P_SPINQ(g),XP(C)::R1(D),XQ(g)
        • Q(g);OGATE,P_PINQ(B),XB(G)::R(D)+P(C),XQ(g)
        • B(f);P_SPINS(h),XS(J)::QAR1(B)
        • S(h);N_GUARD,P_SPINB(f),XB(G)::QAR1(B)
        • S(h);N_GUARD,P_SPINB(f)::QAR1(B),XS(h)
        • P(b);OGATE::QAB1(B)
      • Refutation
        • B(a);XS(E)
  • Actual
    • B(G);XP(e)
    • Threat
      • QAB(B)
    • Vars
      • Q(g);N_GUARD,P_SPINQ(g),XS(J)::R(D)+B(G),XP(b)
      • Q(g);OGATE,P_SPINQ(g),XB(G)::R1(D),XQ(g)
      • B(f);N_GUARD,P_SPINB(f),P_SPINS(h),XS(J)::QAR2(B),XP(c)
      • Q(g);N_GUARD,P_PINQ(B)::R(D)+B(G),XQ(g)
      • S(h);N_GUARD,P_SPINB(f)::QAR1(B),XS(h)
      • S(h);N_GUARD,P_SPINB(f)::QAR1(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).