MESON Chess Problem Database

Problem Display
PID: 199710 (Br1R3n/8/q2R2r1/2pPBpp1/2p1kp2/2P2N1N/5PK1/5Qn1 w - - 0 1)

Petite, Efren

Variantim, 1997

Br1R3n/8/q2R2r1/2pPBpp1/2p1kp2/2P2N1N/5PK1/5Qn1

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Qxc4#
    • 1...Qc8
      • 2.Qxc4#
    • 1...Qa1
      • 2.Qxc4#
    • 1...Qa3
      • 2.Qxc4#
    • 1...Qa5
      • 2.Qxc4#
    • 1...Qb6
      • 2.Qxc4#
    • 1...Qc6
      • 2.Qxc4#
    • 1...Qxd6
      • 2.Qxc4#
    • 1...Qa7
      • 2.Qxc4#
    • 1...Qxa8
      • 2.Qxc4#
    • 1...Rxd6
      • 2.Shxg5#
    • 1...Re6
      • 2.Shxg5#
    • 1...Rf6
      • 2.Shxg5#
    • 1...Rh6
      • 2.Shxg5#
    • 1...Rb1
      • 2.Qxb1#
    • 1...Rb5
      • 2.Qxc4#
    • 1...Rxa8
      • 2.Qb1#
    • 1...Rc8
      • 2.Qb1#
    • 1...Rxd8
      • 2.Qb1#
    • 1...Se2
      • 2.Qxe2#
    • 1...Sxf3
      • 2.Qe2#
    • 1...Sxh3
      • 2.Qe2#
  • Tries
    • 1.Rxa6?
      • threat
        • 2.Qxc4#
      • 1...Sxf3
        • 2.Qe2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Rb4!
    • 1.Re6?
      • threat
        • 2.Sd2#
      • 1...Qxe6
        • 2.Qxc4#
      • 1...Rxe6
        • 2.Shxg5#
      • 1...Sxf3
        • 2.Qe2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Qa2
        • 2.Bf6#
      • 1...Rb2!
    • 1.Rxg6?
      • threat
        • 2.Shxg5#
      • 1...Qxg6
        • 2.Qxc4#
      • 1...Sxf3
        • 2.Qe2#
      • 1...Sxh3
        • 2.Qe2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Qf6
        • 2.Qxc4#
      • 1...g4
        • 2.Shg5#
      • 1...Sf7!
    • 1.Re8?
      • threat
        • 2.Sd2#
      • 1...Rxe8
        • 2.Qb1#
      • 1...Sxf3
        • 2.Qe2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Re6
        • 2.Shxg5#
      • 1...Rb2
        • 2.Bf6#
      • 1...Qa2!
    • 1.Qe1+?
      • 1...Se2
        • 2.Qxe2#
      • 1...Kd3!
  • Keys
    • 1.Bf6!
      • threat
        • 2.Sd2#
      • 1...Rxf6
        • 2.Shxg5#
      • 1...Sxf3
        • 2.Qe2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Qa2
        • 2.Re6#
      • 1...Rb2
        • 2.Re8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 19
  • Sets
    • Q(h);N_GUARD::QAR2(A),XP(b)
    • Q(h);N_GUARD,XR(I)::QAR2(A),XP(b)
    • Q(h);N_GUARD,XB(J)::QAR2(A),XP(b)
    • R(i);N_GUARD,XR(I)::S(F),XP(g)
    • R(i);N_GUARD::S(F),XP(g)
    • R(j);N_GUARD::QAB(A),XR(j)
    • R(j);S_CUTQ(h)::QAR2(A),XP(b)
    • R(j);N_GUARD,XB(J)::QAB(A)
    • R(j);N_GUARD::QAB(A)
    • R(j);N_GUARD,XR(K)::QAB(A)
    • S(a);N_GUARD::QAR2(A),XS(a)
    • S(a);N_GUARD,XS(E)::QAR2(A)
    • S(a);N_GUARD,XS(F)::QAR2(A)
  • Tries
    • Try
      • R(I);XQ(h)
      • Threat
        • QAR2(A),XP(b)
      • Vars
        • S(a);N_GUARD,XS(E)::QAR2(A)
        • S(a);N_GUARD::QAR2(A),XS(a)
      • Refutation
        • R(j);
    • Try
      • R(I);
      • Threat
        • S(E)
      • Vars
        • Q(h);N_GUARD,XR(I)::QAR2(A),XP(b)
        • R(i);N_GUARD,XR(I)::S(F),XP(g)
        • S(a);N_GUARD,XS(E)::QAR2(A)
        • S(a);N_GUARD::QAR2(A),XS(a)
        • Q(h);N_GUARD,P_PINP(B)::R(I)+B(H)
      • Refutation
        • R(j);P_PINP(B)
    • Try
      • R(I);XR(i)
      • Threat
        • S(F),XP(g)
      • Vars
        • Q(h);N_GUARD,XR(I)::QAR2(A),XP(b)
        • S(a);N_GUARD,XS(E)::QAR2(A)
        • S(a);N_GUARD,XS(F)::QAR2(A)
        • S(a);N_GUARD::QAR2(A),XS(a)
        • Q(h);N_GUARD::QAR2(A),XP(b)
        • P(g);::S(F)
      • Refutation
        • S(k);
    • Try
      • R(K);
      • Threat
        • S(E)
      • Vars
        • R(j);N_GUARD,XR(K)::QAB(A)
        • S(a);N_GUARD,XS(E)::QAR2(A)
        • S(a);N_GUARD::QAR2(A),XS(a)
        • R(i);N_GUARD::S(F),XP(g)
        • R(j);N_GUARD,P_PINP(B)::R(K)+B(H)
      • Refutation
        • Q(h);P_PINP(B)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(A),XS(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • B(H);
    • Threat
      • S(E)
    • Vars
      • R(i);N_GUARD,XB(H)::S(F),XP(g)
      • S(a);N_GUARD,XS(E)::QAR2(A)
      • S(a);N_GUARD::QAR2(A),XS(a)
      • Q(h);N_GUARD,P_PINP(B)::R(I)
      • R(j);N_GUARD,P_PINP(B)::R(K)
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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).