MESON Chess Problem Database

Problem Display
PID: 238654 (2Qn4/4N1KB/2bP1R1n/4k1p1/r3p1r1/2P2P2/2q2B2/2N1R3 w - - 0 1)

Hartong, Jan

Wilson, Francis Vaux

Die Schwalbe, 1970

2Qn4/4N1KB/2bP1R1n/4k1p1/r3p1r1/2P2P2/2q2B2/2N1R3

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Sd3#
    • 1...Qd3
      • 2.Sxd3#
    • 1...Qa2
      • 2.Sd3#
    • 1...Qb2
      • 2.Sd3#
    • 1...Qxf2
      • 2.Sd3#
    • 1...Ra1
      • 2.Bd4#
    • 1...Ra2
      • 2.Bd4#
    • 1...Ra3
      • 2.Bd4#
    • 1...Rd4
      • 2.Bxd4#
      • 2.cxd4#
    • 1...Ra5
      • 2.Bd4#
    • 1...Ra6
      • 2.Bd4#
    • 1...Ra7
      • 2.Bd4#
    • 1...Ra8
      • 2.Bd4#
    • 1...Rg3
      • 2.Bxg3#
    • 1...Bb5
      • 2.Qc5#
    • 1...Bd5
      • 2.Sg6#
    • 1...Bd7
      • 2.Qc5#
    • 1...Be8
      • 2.Qc5#
    • 1...Sf5+
      • 2.Qxf5#
    • 1...Shf7
      • 2.Qf5#
    • 1...Sg8
      • 2.Qf5#
    • 1...Se6+
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qe6#
    • 1...Sdf7
      • 2.Qe6#
  • Tries
    • 1.Sxc6+?
      • 1...Sxc6
        • 2.Qe6#
      • 1...Kd5!
    • 1.Bg8?
      • threat
        • 2.Sg6#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Sxg8
        • 2.Qf5#
      • 1...Ra7
        • 2.Bd4#
      • 1...Be8
        • 2.Qc5#
      • 1...Shf7
        • 2.Qf5#
      • 1...Sdf7
        • 2.Qe6#
      • 1...e3!
    • 1.Rf5+?
      • 1...Kxd6
        • 2.Bc5#
      • 1...Sxf5+!
    • 1.fxe4?
      • threat
        • 2.Sg6#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Qxe4
        • 2.Sd3#
      • 1...Raxe4
        • 2.Bd4#
      • 1...Rgxe4
        • 2.Bg3#
      • 1...Bxe4
        • 2.Qc5#
      • 1...Ra7
        • 2.Bd4#
      • 1...Be8
        • 2.Qc5#
      • 1...Qe2!
  • Keys
    • 1.Bxe4!
      • threat
        • 2.Sg6#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Qxe4
        • 2.Sd3#
      • 1...Raxe4
        • 2.Bd4#
      • 1...Rgxe4
        • 2.Bg3#
      • 1...Bxe4
        • 2.Qc5#
      • 1...Ra7
        • 2.Bd4#
      • 1...Be8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 19
  • Sets
    • Q(a);N_GUARD::S(A)
    • Q(a);N_GUARD::S(A),XQ(a)
    • Q(a);N_GUARD,XB(C)::S(A)
    • R(b);N_GUARD::B(C)
    • R(b);N_GUARD,P_PINS(H)::B(C)
    • R(d);N_GUARD::B(C),XR(d)
    • B(g);OGATE::QAR2(K)
    • B(g);SBLOCK::S(H)
    • S(h);CHECK,N_GUARD::QAR1(K),XS(h)
    • S(h);N_GUARD::QAR1(K)
    • S(i);CHECK,N_GUARD::QAR1(K),XS(i)
    • S(i);N_GUARD::QAR1(K)
  • Tries
    • Try
      • S(H);CHECK,XB(g)
      • Vars
        • S(i);XS(H)::QAR1(K)
      • Refutation
        • K(e);N_SPINP(c),P-FLIGHT
    • Try
      • B(J);
      • Threat
        • S(H)
      • Vars
        • S(h);CHECK,N_GUARD::QAR1(K),XS(h)
        • S(i);CHECK,N_GUARD::QAR1(K),XS(i)
        • S(h);N_GUARD,XB(J)::QAR1(K)
        • R(b);N_GUARD,P_PINS(H)::B(C)
        • B(g);OGATE::QAR2(K)
        • S(h);N_GUARD::QAR1(K)
        • S(i);N_GUARD::QAR1(K)
      • Refutation
        • P(c);
    • Try
      • R(G);CHECK
      • Vars
        • K(e);N_SPINP(c),S_FLIGHT,XP(F)::B(C)
      • Refutation
        • S(h);CHECK,XR(G)
    • Try
      • P(E);XP(c)
      • Threat
        • S(H)
      • Vars
        • S(h);CHECK,N_GUARD::QAR1(K),XS(h)
        • S(i);CHECK,N_GUARD::QAR1(K),XS(i)
        • Q(a);N_GUARD,P_SPINQ(a),XP(E)::S(A)
        • R(b);N_GUARD,P_SPINR(b),XP(E)::B(C)
        • R(d);N_GUARD,P_SPINR(d),XP(E)::B(C)
        • B(g);OGATE,P_SPINB(g),XP(E)::QAR2(K)
        • R(b);N_GUARD,P_PINS(H)::B(C)
        • B(g);OGATE::QAR2(K)
      • Refutation
        • Q(a);
  • Actual
    • B(J);XP(c)
    • Threat
      • S(H)
    • Vars
      • S(h);CHECK,N_GUARD::QAR1(K),XS(h)
      • S(i);CHECK,N_GUARD::QAR1(K),XS(i)
      • Q(a);N_GUARD,P_SPINQ(a),XB(J)::S(A)
      • R(b);N_GUARD,P_SPINR(b),XB(J)::B(C)
      • R(d);N_GUARD,P_SPINR(d),XB(J)::B(C)
      • B(g);OGATE,P_SPINB(g),XB(J)::QAR2(K)
      • R(b);N_GUARD,P_PINS(H)::B(C)
      • B(g);OGATE::QAR2(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).