MESON Chess Problem Database
Problem Display
PID: 191279 (b2Q3b/r2p4/p1R1Bp2/3NkPN1/2K3pn/1P4P1/8/8 w - - 0 1)
Coello Alonso, Jose Antonio
BCPS Website, 2019
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...d6
- 2.Qxd6#
- 1...d6
- Tries
- 1.Qc7+?
- 1...d6
- 2.Qxd6#
- 1...Rxc7!
- 1...d6
- 1.Qe7?
- threat
- 2.Bxd7#
- 2.Qd6#
- 1...Bxc6
- 2.Bxd7#
- 1...fxg5
- 2.Bxd7#
- 1...dxc6
- 2.Bd7#
- 1...dxe6
- 2.Qxe6#
- 1...Sg6
- 2.Qd6#
- 1...d6
- 2.Bd7#
- 2.Qxd6#
- 1...Sxf5!
- threat
- 1.Qb8+?
- 1...d6
- 2.Qxd6#
- 1...Rc7!
- 1...d6
- 1.Qc7+?
- Keys
- 1.Sc3!
- threat
- 2.Sf7#
- 1...d5+
- 2.Qxd5#
- 1...fxg5
- 2.Qxh8#
- 1...dxc6
- 2.Qd4#
- 1...dxe6
- 2.Qa5#
- 1...d6
- 2.Qxd6#
- threat
- 1.Sc3!
This is a version of 5972
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- P(g);OGATE::QAB1(I),XP(g)
- Tries
- Try
- Q(I);CHECK
- Vars
- P(g);P_SPINP(g)::QAB1(I),XP(g)
- Refutation
- R(f);P_PINR(G),XQ(I)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- B(h);XR(G)::QAR(I)+B(H),XP(g)
- P(e);XS(F)::QAR(I)+B(H),XP(g)
- P(g);XR(G)::QAR(I)+B(H)
- P(g);OGATE,P_SPINP(g),XB(H)::QAR1(I),XP(g)
- S(b);::QAB1(I)
- Refutation
- S(b);XP(E)
- Try
- Q(I);CHECK
- Vars
- P(g);P_SPINP(g)::QAB1(I),XP(g)
- Refutation
- R(f);P_PINR(G),P_SPINR(f)
- Try
- Actual
- S(D);
- Threat
- S(F)
- Vars
- P(g);CHECK,OGATE::QAR1(I),XP(g)
- P(e);OGATEB,XS(F)::QAB(I),XB(i)
- P(g);OGATE,XR(G)::QAB1(I)
- P(g);N_GUARD,XB(H)::QAR(I)
- P(g);OGATE::QAB1(I),XP(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).