MESON Chess Problem Database

Problem Display
PID: 263187 (r2q4/2P1pN2/2Q5/6P1/3kpRP1/pPN1p3/3P1br1/K3Bb2 w - - 0 1)

Murashev, Pavel Aleksandrovich

SuperProblem, 2021

r2q4/2P1pN2/2Q5/6P1/3kpRP1/pPN1p3/3P1br1/K3Bb2

#2

11 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qxe4#
    • 1...Qxc7
      • 2.Qd5#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qb8
      • 2.Qd5#
    • 1...Qc8
      • 2.Qd5#
    • 1...Qe8
      • 2.Qd5#
    • 1...Qf8
      • 2.Qd5#
    • 1...Qg8
      • 2.Qd5#
    • 1...Qh8
      • 2.Qd5#
    • 1...Ra4
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Ra6
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Bd3
      • 2.Qb6#
    • 1...Bc4
      • 2.Qxc4#
    • 1...e2
      • 2.Qc4#
  • Tries
    • 1.Se2+?
      • 1...Kd3
        • 2.Qc4#
      • 1...Bxe2!
    • 1.Sb5+?
      • 1...Kd3
        • 2.Qc4#
      • 1...Bxb5!
    • 1.Se5?
      • threat
        • 2.Rxe4#
      • 1...Kxe5
        • 2.Rxe4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Bd3
        • 2.Sf3#
      • 1...Rxg4!
    • 1.dxe3+?
      • 1...Kd3
        • 2.Qxe4#
      • 1...Kxe3
        • 2.Qxe4#
      • 1...Bxe3!
    • 1.d3?
      • threat
        • 2.Qc4#
      • 1...Kxd3
        • 2.Qxe4#
      • 1...Qxc7
        • 2.Qd5#
      • 1...Bxd3
        • 2.Qb6#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Ra4
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...e2!
    • 1.b4?
      • threat
        • 2.Qxe4#
      • 1...Kd3
        • 2.Qxe4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Bd3
        • 2.Qc5#
      • 1...exd2!
    • 1.c8Q?
      • threat
        • 2.Qxe4#
      • 1...Kd3
        • 2.Qxe4#
      • 1...Qxc8
        • 2.Qd5#
      • 1...Qc7
        • 2.Qd5#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Bd3
        • 2.Qc5#
      • 1...Rxc8!
    • 1.c8R?
      • threat
        • 2.Qxe4#
      • 1...Kd3
        • 2.Qxe4#
      • 1...Qxc8
        • 2.Qd5#
      • 1...Qc7
        • 2.Qd5#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Bd3
        • 2.Qc5#
      • 1...Rxc8!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Qxe4#
      • 1...Kd3
        • 2.Qc4#
      • 1...Rxa4
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Qd5
        • 2.Qc3#
      • 1...Bd3
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • K(f);N_GUARD,N_SPINP(g),P-FLIGHT::QAB1(I),XP(g)
    • Q(j);N_GUARD,XP(J)::QAR1(I)
    • Q(j);N_GUARD::QAR1(I),XQ(j)
    • Q(j);N_GUARD::QAR1(I)
    • R(i);N_GUARD::PXQ(j)=Q
    • B(a);SBLOCK::QAB(I)
    • B(a);N_GUARD::QAR1(I),XB(a)
    • P(e);S_CUTB(a)::QAR1(I)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);N_SPINP(g),P-FLIGHT::QAB1(I)
      • Refutation
        • B(a);XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • K(f);N_SPINP(g),P-FLIGHT::QAB1(I)
      • Refutation
        • B(a);XS(E)
    • Try
      • S(K);
      • Threat
        • R1(F),XP(g)
      • Vars
        • K(f);N_SPINP(g),S_FLIGHT,XS(K)::R1(F),XP(g)
        • Q(j);N_GUARD::QAR1(I),XQ(j)
        • B(a);SBLOCK::S(K)
      • Refutation
        • R(c);XP(G)
    • Try
      • P(C);CHECK,XP(e)
      • Vars
        • K(f);N_GUARD,N_SPINP(g),P-FLIGHT::QAB1(I),XP(g)
        • K(f);N_GUARD,N_SPINP(g),S_FLIGHT,XP(C)::QAR1(I),XP(g)
      • Refutation
        • B(b);XP(C)
    • Try
      • P(C);
      • Threat
        • QAR1(I)
      • Vars
        • K(f);N_GUARD,N_SPINP(g),P-FLIGHT,XP(C)::QAB1(I),XP(g)
        • Q(j);N_GUARD,XP(J)::QAR1(I)
        • B(a);SBLOCK,XP(C)::QAB(I)
        • Q(j);N_GUARD::QAR1(I),XQ(j)
        • R(i);N_GUARD::PXQ(j)=Q
      • Refutation
        • P(e);
    • Try
      • P(D);
      • Threat
        • QAR1(I),XP(g)
      • Vars
        • K(f);N_SPINP(g),P-FLIGHT::QAB1(I),XP(g)
        • Q(j);N_GUARD::QAR1(I),XQ(j)
        • B(a);SBLOCK::QAB1(I)
      • Refutation
        • P(e);XP(C)
    • Try
      • P(J);
      • Threat
        • QAR1(I),XP(g)
      • Vars
        • K(f);N_SPINP(g),P-FLIGHT::QAB1(I),XP(g)
        • Q(j);N_GUARD,XQ(J)::QAR1(I)
        • Q(j);N_GUARD::QAR1(I)
        • Q(j);N_GUARD::QAR1(I),XQ(j)
        • B(a);SBLOCK::QAB1(I)
      • Refutation
        • R(i);XQ(J)
    • Try
      • P(J);
      • Threat
        • QAR1(I),XP(g)
      • Vars
        • K(f);N_SPINP(g),P-FLIGHT::QAB1(I),XP(g)
        • Q(j);N_GUARD,XR(J)::QAR1(I)
        • Q(j);N_GUARD::QAR1(I)
        • Q(j);N_GUARD::QAR1(I),XQ(j)
        • B(a);SBLOCK::QAB1(I)
      • Refutation
        • R(i);XR(J)
  • Actual
    • S(E);
    • Threat
      • QAR1(I),XP(g)
    • Vars
      • K(f);N_SPINP(g),P-FLIGHT,S_CUTB(a)::QAB1(I)
      • R(i);N_GUARD,XS(E)::PXQ(j)=Q
      • Q(j);SBLOCK::QAB1(I)
      • B(a);SBLOCK::QAB1(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).