MESON Chess Problem Database
Problem Display
PID: 181269 (K2Nb3/1PBkP3/2pP2p1/8/p1R3p1/7B/2Q2r2/4r3 w - - 0 1)
Petite, Efren
Problem Observer, 2014
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Rf8
- 2.exf8S#
- 1...c5
- 2.Qxa4#
- 1...Rf8
- Tries
- 1.Bxg4+?
- 1...Re6
- 2.Bxe6#
- 1...Rf5!
- 1...Re6
- 1.Re4?
- threat
- 2.Qxc6#
- 1...Rxc2
- 2.Bxg4#
- 1...c5
- 2.Qxa4#
- 1...Rc1!
- threat
- 1.Rf4?
- threat
- 2.Qxc6#
- 1...Rc1
- 2.Bxg4#
- 1...c5
- 2.Qxa4#
- 1...Rxc2!
- threat
- 1.Qe4?
- threat
- 2.Qxc6#
- 1...c5
- 2.Qc6#
- 1...Rxe4!
- threat
- 1.Bxg4+?
- Keys
- 1.Rxg4!
- threat
- 2.Qxc6#
- 1...Rxc2
- 2.Re4#
- 1...Rc1
- 2.Rf4#
- 1...c5
- 2.Qxa4#
- threat
- 1.Rxg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- R(b);OGATE::PXR(b)=S
- P(e);OGATEB::QAB(A),XP(c)
- Tries
- Try
- B(B);CHECK,XP(d)
- Vars
- R(a);N_GUARD,P_SPINR(a)::B(B),XR(a)
- Refutation
- R(b);P_SPINR(b)
- Try
- R(C);
- Threat
- QAB1(A),XP(e)
- Vars
- R(b);N_GUARD,XQ(A)::B(B),XP(d)
- P(e);OGATEB::QAB(A),XP(c)
- Refutation
- R(a);
- Try
- R(C);
- Threat
- QAB1(A),XP(e)
- Vars
- R(a);N_GUARD::B(B),XP(d)
- P(e);OGATEB::QAB(A),XP(c)
- Refutation
- R(b);XQ(A)
- Try
- Q(A);
- Threat
- QAB1(A),XP(e)
- Vars
- P(e);::QAB1(A)
- Refutation
- R(a);XQ(A)
- Try
- Actual
- R(C);XP(d)
- Threat
- QAB1(A),XP(e)
- Vars
- R(b);N_GUARD,XQ(A)::B(B)+R(C)
- R(a);N_GUARD::B(B)+R(C)
- P(e);OGATEB::QAB(A),XP(c)
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).