MESON Chess Problem Database
Problem Display
PID: 137363 (Q5BK/8/1RPrPR2/2rkp3/4N3/1P1P1N1b/2p5/b7 w - - 0 1)
Ellerman, Arnoldo
Caissa, 1944
#2
11 + 7
SOLUTION
- SOUND
- Sets
- 1...Rc4
- 2.bxc4#
- 1...Ra5
- 2.Qxa5#
- 1...Rb5
- 2.Rxb5#
- 1...Rcxc6
- 2.Rb5#
- 1...Rxe6
- 2.Qd8#
- 1...Rd8
- 2.Qxd8#
- 1...Rc4
- Tries
- 1.c7+?
- 1...Rcc6
- 2.Rb5#
- 1...Rdc6!
- 1...Rcc6
- 1.e7+?
- 1...Re6
- 2.Qd8#
- 1...Be6!
- 1...Re6
- 1.c7+?
- Keys
- 1.Rf5!
- threat
- 2.Sf6#
- 1...Rcxc6
- 2.Rb5#
- 1...Rdxc6
- 2.e7#
- 1...Rxe6
- 2.Qd8#
- 1...Rc3
- 2.Rxe5#
- 1...Rc4
- 2.bxc4#
- 1...Ra5
- 2.Qxa5#
- 1...Rb5
- 2.Rxb5#
- 1...Rd7
- 2.exd7#
- 2.e7#
- 1...Rd8
- 2.Qxd8#
- threat
- 1.Rf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(d);OGATE::P(A),XR(d)
- R(d);OGATEB::QAR(I),XR(d)
- R(d);OGATEB::R(E),XR(d)
- R(d);OGATEB,P_SPINR(d),XP(F)::R(E)
- R(g);OGATEB,P_SPINR(g),XP(G)::QAR(I)
- R(g);OGATEB,P_PINB(J)::QAR(I),XR(g)
- Tries
- Try
- P(F);CHECK
- Vars
- R(d);P_SPINR(d),S_CUTR(g)::R(E)
- Refutation
- R(g);P_SPINR(g)
- Try
- P(G);CHECK
- Vars
- R(g);P_SPINR(g),S_CUTB(c)::QAR(I)
- Refutation
- B(c);P_SPINB(c)
- Try
- Actual
- R(H);P_PINP(f)
- Threat
- S(D)
- Vars
- R(d);OGATEB,P_SPINR(d),XP(F)::R(E)
- R(g);N_GUARD,P_SPINR(g),XP(F)::B(J)+P(G)
- R(g);OGATEB,P_SPINR(g),XP(G)::QAR(I)
- R(d);S_CUTB(a)::R1(H),XP(f)
- R(d);OGATE::P(A),XR(d)
- R(d);OGATEB::QAR(I),XR(d)
- R(d);OGATEB::R(E),XR(d)
- R(g);OGATEB,P_PINB(J)::QAR(I),XR(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).