MESON Chess Problem Database

Problem Display
PID: 227153 (b3R3/1BN1B3/p1q1p2b/3R1p2/4k3/1pp1p1pN/4QnKn/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

StrateGems, 2020

b3R3/1BN1B3/p1q1p2b/3R1p2/4k3/1pp1p1pN/4QnKn/8

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb7
      • 2.Qc4#
    • 1...Qd7
      • 2.Qc4#
    • 1...Qxe8
      • 2.Qc4#
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qd6
      • 2.Qc4#
    • 1...Sd1
      • 2.Qd3#
    • 1...Sh1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sfg4
      • 2.Qd3#
    • 1...Sf1
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Shg4
      • 2.Qf3#
  • Tries
    • 1.Bxc6?
      • threat
        • 2.Qc4#
      • 1...exd5
        • 2.Bc5#
        • 2.Bf6#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Bg7!
    • 1.Bd6?
      • threat
        • 2.Rxe6#
      • 1...Qxd5
        • 2.Qc4#
      • 1...Qxe8
        • 2.Qc4#
      • 1...Qxd6
        • 2.Qc4#
      • 1...Qd7
        • 2.Qc4#
      • 1...Bg7
        • 2.Sg5#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sfg4
        • 2.Qd3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Shg4
        • 2.Qf3#
      • 1...e5
        • 2.Rexe5#
      • 1...Bf4!
    • 1.Bf6?
      • threat
        • 2.Rd4#
      • 1...Qxd5
        • 2.Rxe6#
        • 2.Qc4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...e5
        • 2.Rexe5#
      • 1...f4!
    • 1.Qc2+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...bxc2!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Qc4#
      • 1...Qxd5
        • 2.Rxe6#
      • 1...Qxc5
        • 2.Rxe6#
      • 1...Qa4
        • 2.Rxe6#
      • 1...Qb5
        • 2.Rxe6#
      • 1...Bg7
        • 2.Qxe3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sf3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 10
  • Sets
    • Q(j);N_GUARD,XB(E)::QAR2(A)
    • Q(j);N_GUARD::QAR2(A)
    • Q(j);N_GUARD,XR(H)::QAR2(A)
    • Q(j);N_GUARD::QAR2(A),XQ(j)
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
    • S(b);N_GUARD::QAB1(A)
    • S(b);N_GUARD::QAB1(A),XS(b)
  • Tries
    • Try
      • B(E);XQ(j)
      • Threat
        • QAR2(A)
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • B(l);
    • Try
      • B(G);
      • Threat
        • R(H),XP(k)
      • Vars
        • Q(j);N_GUARD,P_SPINQ(j),XR(D)::QAR2(A)
        • Q(j);N_GUARD,XR(H)::QAR2(A)
        • Q(j);N_GUARD,XB(G)::QAR2(A)
        • Q(j);N_GUARD::QAR2(A)
        • B(l);N_GUARD::S(C)
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
        • S(b);N_GUARD::QAB1(A)
        • P(k);OGATE::R1(H),XP(k)
      • Refutation
        • B(l);
    • Try
      • B(G);
      • Threat
        • R1(D)
      • Vars
        • S(b);N_GUARD::QAB1(A),XS(b)
        • P(k);OGATE::R1(H),XP(k)
      • Refutation
        • P(h);
    • Try
      • Q(A);CHECK,N_PINP(e)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • B(G);
    • Threat
      • QAR2(A)
    • Vars
      • Q(j);N_GUARD,P_SPINQ(j),XR(D)::R(H),XP(k)
      • Q(j);N_GUARD,XB(G)::R(H),XP(k)
      • Q(j);N_GUARD::R(H),XP(k)
      • B(l);N_GUARD::QAR1(A),XP(e)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • S(b);N_GUARD::QAB1(A),XS(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).