MESON Chess Problem Database
Problem Display
PID: 274207 (5B2/4KPpq/R1b1p3/R2pk1N1/2p5/1nPnN1P1/4B3/1Q6 w - - 0 1)
Coello Alonso, Jose Antonio
Zaragoza, Luis
BCPS Website, 2024
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qe4
- 2.Bxg7#
- 1...Qf5
- 2.Sxc4#
- 1...Qh1
- 2.Bxg7#
- 1...Qh2
- 2.Bxg7#
- 1...Qh3
- 2.Bxg7#
- 1...Qh4
- 2.Bxg7#
- 1...Qh5
- 2.Bxg7#
- 1...Ba4
- 2.Rxe6#
- 1...Bb5
- 2.Rxe6#
- 1...Bb7
- 2.Rxe6#
- 1...Ba8
- 2.Rxe6#
- 1...Be8
- 2.Rxe6#
- 1...Sa1
- 2.Qb8#
- 1...Sbc1
- 2.Qb8#
- 1...Sd2
- 2.Qb8#
- 1...Sd4
- 2.Qb8#
- 1...Sxa5
- 2.Qb8#
- 1...Sbc5
- 2.Qb8#
- 1...Sdc1
- 2.Sxc4#
- 2.Sg4#
- 2.Sf3#
- 1...Se1
- 2.Sxc4#
- 2.Sg4#
- 1...Sb2
- 2.Sg4#
- 2.Sf3#
- 1...Sf2
- 2.Sxc4#
- 2.Sf3#
- 1...Sb4
- 2.Sxc4#
- 2.Sg4#
- 2.Sf3#
- 1...Sf4
- 2.Sxc4#
- 2.Sg4#
- 2.Sf3#
- 1...Sdc5
- 2.Sg4#
- 2.Sf3#
- 1...Qe4
- Tries
- 1.Bxd3?
- threat
- 2.Sxc4#
- 2.Sg4#
- 2.Sf3#
- 1...Qxd3
- 2.Bxg7#
- 1...Sxa5
- 2.Sg4#
- 2.Sf3#
- 2.Qb8#
- 1...Qe4
- 2.Bxg7#
- 1...Qf5
- 2.Sxc4#
- 1...Qh1
- 2.Sxc4#
- 2.Sg4#
- 2.Bxg7#
- 1...Qh3
- 2.Sxc4#
- 2.Sf3#
- 2.Bxg7#
- 1...Qh4
- 2.Bxg7#
- 1...Qh5
- 2.Sxc4#
- 2.Bxg7#
- 1...Bb5
- 2.Sg4#
- 2.Sf3#
- 2.Rxe6#
- 1...Sd2
- 2.Sg4#
- 2.Qb8#
- 1...Sd4
- 2.Sxc4#
- 2.Sg4#
- 2.Qb8#
- 1...Sc5
- 2.Sg4#
- 2.Sf3#
- 2.Qb8#
- 1...cxd3!
- threat
- 1.Qxd3?
- threat
- 2.Sxc4#
- 2.Sg4#
- 2.Sf3#
- 1...Qxd3
- 2.Bxg7#
- 1...Sxa5
- 2.Sg4#
- 2.Sf3#
- 2.Qd4#
- 1...Qe4
- 2.Bxg7#
- 2.Qxe4#
- 1...Qf5
- 2.Sxc4#
- 1...Qh1
- 2.Sxc4#
- 2.Sg4#
- 2.Bxg7#
- 1...Qh3
- 2.Sxc4#
- 2.Sf3#
- 2.Bxg7#
- 2.Qe4#
- 1...Qh4
- 2.Bxg7#
- 1...Qh5
- 2.Sxc4#
- 2.Bxg7#
- 2.Qe4#
- 1...Bb5
- 2.Sg4#
- 2.Sf3#
- 2.Rxe6#
- 1...Sd2
- 2.Sg4#
- 2.Qd4#
- 1...Sd4
- 2.Sxc4#
- 2.Sg4#
- 2.Qxd4#
- 2.cxd4#
- 1...Sc5
- 2.Sg4#
- 2.Sf3#
- 2.Qd4#
- 1...cxd3!
- threat
- 1.Qf1?
- threat
- 2.Sxc4#
- 2.Sg4#
- 1...Sxa5
- 2.Sg4#
- 1...Qe4
- 2.Bxg7#
- 1...Qf5
- 2.Sxc4#
- 1...Qh3
- 2.Sxc4#
- 2.Bxg7#
- 1...Qh4
- 2.Bxg7#
- 1...Qh5
- 2.Sxc4#
- 2.Bxg7#
- 1...Bb5
- 2.Sg4#
- 2.Rxe6#
- 1...Sd2
- 2.Sg4#
- 1...Sbc5
- 2.Sg4#
- 1...Sb2
- 2.Sg4#
- 2.Qf4#
- 1...Sf4
- 2.Qxf4#
- 2.gxf4#
- 1...Sdc5
- 2.Sg4#
- 2.Qf4#
- 1...Sf2!
- threat
- 1.Bxd3?
- Keys
- 1.Bg4!
- threat
- 2.Sxc4#
- 1...Sxa5
- 2.Qb8#
- 1...Qe4
- 2.Bxg7#
- 1...Bb5
- 2.Rxe6#
- 1...Sd2
- 2.Qb8#
- 1...Sbc5
- 2.Qb8#
- 1...Sb2
- 2.Sf3#
- 1...Sdc5
- 2.Sf3#
- threat
- 1.Bg4!
This is a version of 274206
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 13
- Sets
- Q(i);N_GUARD::B(K),XP(h)
- Q(i);SBLOCK::S(D),XP(c)
- Q(i);N_GUARD,P_PINS(G)::B(K),XP(h)
- B(f);OGATE::R1(H),XP(g)
- B(f);N_SPINP(d),OGATE::R1(H),XP(g)
- S(a);OGATE::QAB(A)
- S(a);N_SPINP(d),OGATE,XR(F)::QAB(A)
- S(a);N_SPINP(d),OGATE::QAB(A)
- Tries
- Try
- B(B);XS(b)
- Threat
- DUALS(3)
- Vars
- Q(i);N_GUARD,XB(B)::B(K),XP(h)
- Q(i);N_GUARD::B(K),XP(h)
- Q(i);::S(D),XP(c)
- Q(i);N_GUARD,P_PINS(G)::B(K),XP(h)
- Refutation
- P(c);XB(B)
- Try
- Q(A);XS(b)
- Threat
- DUALS(3)
- Vars
- Q(i);N_GUARD,XQ(A)::B(K),XP(h)
- Q(i);::S(D),XP(c)
- Q(i);N_GUARD,P_PINS(G)::B(K),XP(h)
- Refutation
- P(c);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(a);N_SPINP(d),XR(F)::S(D)
- Q(i);N_GUARD::B(K),XP(h)
- Q(i);::S(D),XP(c)
- Q(i);N_GUARD,P_PINS(G)::B(K),XP(h)
- S(a);::S(D)
- S(a);N_SPINP(d)::S(D)
- Refutation
- S(b);
- Try
- Actual
- B(B);
- Threat
- S(D),XP(c)
- Vars
- S(a);N_SPINP(d),OGATE,XR(F)::QAB(A)
- Q(i);N_GUARD::B(K),XP(h)
- B(f);N_SPINP(d),OGATE::R1(H),XP(g)
- S(a);OGATE::QAB(A)
- S(a);N_SPINP(d),OGATE::QAB(A)
- S(b);::S(G)
- S(b);N_SPINP(d)::S(G)
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).