MESON Chess Problem Database

Problem Display
PID: 28817 (2b5/2p1B3/2pR1pr1/3PkP2/n1P4P/p2BN1PK/2N1q2n/b3QR2 w - - 0 1)

Araujo, P

Nascimento, Raul C

Vinagre, Jose C

StrateGems, 2001

2b5/2p1B3/2pR1pr1/3PkP2/n1P4P/p2BN1PK/2N1q2n/b3QR2

#2

13 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sxd1#
      • 2.Sg4#
    • 1...Qxf1+
      • 2.Sxf1#
    • 1...Qxd3
      • 2.Sg4#
    • 1...Qf3
      • 2.Sg4#
    • 1...Qg4+
      • 2.Sxg4#
    • 1...Qh5
      • 2.Sg4#
    • 1...Qxc2
      • 2.Sxc2#
    • 1...Qd2
      • 2.Sg4#
    • 1...Qf2
      • 2.Sg4#
    • 1...Qg2+
      • 2.Sxg2#
    • 1...Qxe3
      • 2.Qxe3#
    • 1...Rxg3+
      • 2.Qxg3#
    • 1...Bxf5+
      • 2.Rxf5#
    • 1...Ba6
      • 2.Re6#
    • 1...Be6
      • 2.Rxe6#
    • 1...Bb7
      • 2.Re6#
    • 1...Sb2
      • 2.Qc3#
    • 1...Sc5
      • 2.Qxa1#
    • 1...Sb6
      • 2.Qxa1#
    • 1...cxd5
      • 2.Rxd5#
  • Tries
    • 1.Qxa1+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb2!
    • 1.Qxe2?
      • threat
        • 2.Sd1#
        • 2.Sg2#
        • 2.Sg4#
      • 1...Bxf5+
        • 2.Sg4#
        • 2.Sxf5#
        • 2.Rxf5#
      • 1...Sxf1
        • 2.Sxf1#
        • 2.Sg4#
      • 1...Rg4
        • 2.Sxg4#
      • 1...Bd4
        • 2.Sg4#
      • 1...Sg4
        • 2.Sxg4#
      • 1...Sc3
        • 2.Sg4#
      • 1...Sc5
        • 2.Sg4#
      • 1...Rxg3+!
  • Keys
    • 1.c5!
      • threat
        • 2.Sc4#
      • 1...Qxf1+
        • 2.Sxf1#
      • 1...Qg4+
        • 2.Sxg4#
      • 1...Qg2+
        • 2.Sxg2#
      • 1...Rxg3+
        • 2.Qxg3#
      • 1...Bxf5+
        • 2.Rxf5#
      • 1...Qxc2
        • 2.Sxc2#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...cxd5
        • 2.Rxd5#
      • 1...cxd6
        • 2.Bxd6#
      • 1...Rg4
        • 2.Bxf6#
      • 1...Ba6
        • 2.Re6#
      • 1...Sb2
        • 2.Qc3#
      • 1...Sb6
        • 2.Qxa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(b);CHECK,XR(B)::QAR(A)+S(E),XQ(b)
    • Q(b);XB(D)::QAR(A)+S(E),DCHECK
    • Q(b);N_PINP(K),P_PINP(F)::QAR(A)+S(E),DCHECK
    • Q(b);CHECK,N_PINP(K)::QAR(A)+S(E),DCHECK,XQ(b)
    • Q(b);N_PINP(K),P_PINP(I)::QAR(A)+S(E),DCHECK
    • Q(b);XS(C)::QAR(A)+S(E),XQ(b)
    • Q(b);::QAR(A)+S(E),DCHECK
    • Q(b);CHECK::QAR(A)+S(E),XQ(b)
    • Q(b);N_PINP(K),OGATE,P_PINP(F),P_SPINQ(b),XS(E)::QAR2(A),XQ(b)
    • R(i);CHECK,OGATE,XP(F)::QAB(A),XR(i)
    • B(k);CHECK,OGATE,XP(K)::R1(B),XB(k)
    • B(k);N_GUARD,N_PINP(K)::R1(L)
    • B(k);N_GUARD::R1(L),XB(k)
    • S(e);N_GUARD,S_CUTB(a)::QAB(A)
    • S(e);N_GUARD::QAB(A),XB(a)
    • P(g);OGATE,XP(J)::R1(L),XP(g)
  • Tries
    • Try
      • Q(A);CHECK,XB(a)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB(A),XS(e)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • Q(A);XQ(b)
      • Threat
        • DUALS(3)
      • Vars
        • R(i);N_PINP(K)::QAR(A)+S(E),DCHECK,XR(i)
        • B(a);::QAR(A)+S(E),DCHECK
        • S(c);N_PINP(K)::QAR(A)+S(E),DCHECK,XS(c)
        • S(e);::QAR(A)+S(E),DCHECK
      • Refutation
        • R(i);CHECK,XP(F)
  • Actual
    • P(H);
    • Threat
      • S(E)
    • Vars
      • Q(b);CHECK,XR(B)::QAR(A)+S(E),XQ(b)
      • Q(b);CHECK,N_PINP(K)::QAR(A)+S(E),DCHECK,XQ(b)
      • Q(b);CHECK::QAR(A)+S(E),XQ(b)
      • R(i);CHECK,OGATE,XP(F)::QAB(A),XR(i)
      • B(k);CHECK,OGATE,XP(K)::R1(B),XB(k)
      • Q(b);XS(C)::QAR(A)+S(E),XQ(b)
      • Q(b);N_PINP(K),OGATE,P_PINP(F),P_SPINQ(b),XS(E)::QAR2(A),XQ(b)
      • P(g);OGATE,XP(J)::R1(L),XP(g)
      • P(j);OGATE,XR(L)::B(M),XP(j)
      • R(i);N_GUARD,N_PINP(K)::B(M),XP(h)
      • B(k);N_GUARD,N_PINP(K)::R1(L)
      • S(e);N_GUARD,S_CUTB(a)::QAB(A)
      • S(e);N_GUARD::QAB(A),XB(a)
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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).