MESON Chess Problem Database
Problem Display
PID: 170067 (1B4n1/8/2pR1p2/N3k1rQ/q1Pn4/3BPpR1/1r5p/b2bN2K w - - 0 1)
Arguelles Ferrer, Antonio Fernandez
2/3 HM., Enroque!!, 1948
#2
10 + 12
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxc4
- 2.Sxc4#
- 1...Ra2
- 2.Rxc6#
- 1...Rc2
- 2.Rxc6#
- 1...Rd2
- 2.Rxc6#
- 1...Re2
- 2.Rxc6#
- 1...Rf2
- 2.Rxc6#
- 1...Rg2
- 2.Rxc6#
- 1...Bb3
- 2.Rxc6#
- 1...Se2
- 2.Sxf3#
- 1...Sb3
- 2.Rxc6#
- 1...Sb5
- 2.Sxc6#
- 1...Se6
- 2.Rd5#
- 1...c5
- 2.Rb6#
- 1...Qxc4
- Tries
- 1.Rd7+?
- 1...Ke6
- 2.Qf7#
- 1...Rxb8!
- 1...Ke6
- 1.Qg4?
- threat
- 2.Rd5#
- 2.Re6#
- 2.Qxd4#
- 2.Qe4#
- 2.Qf4#
- 2.exd4#
- 1...Qxc4
- 2.Sxc4#
- 2.Qe4#
- 2.Qf4#
- 1...Rxb8
- 2.Qf4#
- 1...Rb1
- 2.Rd5#
- 2.Re6#
- 2.Qe4#
- 2.Qf4#
- 1...Ra2
- 2.Rxd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Rd8#
- 2.Qe4#
- 2.Qf4#
- 1...Rc2
- 2.Rxd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Rd8#
- 2.Qe4#
- 2.Qf4#
- 1...Rd2
- 2.Rxd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Rd8#
- 2.Qe4#
- 2.Qf4#
- 1...Re2
- 2.Rxd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Rd8#
- 2.Qe4#
- 2.Qf4#
- 1...Rf2
- 2.Rxd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Rd8#
- 2.Qe4#
- 2.Qf4#
- 1...Rg2
- 2.Rxd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Rd8#
- 2.Qe4#
- 2.Qf4#
- 1...Rb3
- 2.Rd5#
- 2.Re6#
- 2.Qe4#
- 2.Qf4#
- 1...Rb4
- 2.Rd5#
- 2.Re6#
- 2.Qe4#
- 2.Qf4#
- 1...Rb5
- 2.Rd5#
- 2.Re6#
- 2.Qe4#
- 2.Qf4#
- 1...Rb6
- 2.Rd5#
- 2.Re6#
- 2.Qe4#
- 2.Qf4#
- 1...Rb7
- 2.Rd5#
- 2.Re6#
- 2.Qe4#
- 2.Qf4#
- 1...Rf5
- 2.Qxd4#
- 2.Qe4#
- 2.exd4#
- 1...Sc2
- 2.Rd5#
- 2.Re6#
- 2.Qe6#
- 2.Qe4#
- 2.Qf4#
- 1...Se2
- 2.Sxf3#
- 2.Rd5#
- 2.Re6#
- 2.Qe6#
- 2.Qe4#
- 1...Sb3
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Rd8#
- 2.Qe6#
- 2.Qe4#
- 2.Qf4#
- 1...Sb5
- 2.Sxc6#
- 2.Rd5#
- 2.Re6#
- 2.Qe6#
- 2.Qe4#
- 2.Qf4#
- 1...Sf5
- 2.Qe4#
- 2.Qf4#
- 1...Se6
- 2.Rd5#
- 2.Rxe6#
- 2.Qxe6#
- 2.Qe4#
- 1...c5
- 2.Rd5#
- 2.Rb6#
- 2.Re6#
- 2.Qe4#
- 2.Qf4#
- 1...f5
- 2.Qxd4#
- 2.Qf4#
- 2.exd4#
- 1...Rxg4!
- threat
- 1.Qf7?
- threat
- 2.Rd5#
- 2.Re6#
- 1...Qxc4
- 2.Sxc4#
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 2.Rxe6#
- 2.Qxe6#
- 1...Rxb8!
- threat
- 1.Qe8+?
- 1...Se6
- 2.Rd5#
- 2.Rxe6#
- 2.Qxe6#
- 1...Se7!
- 1...Se6
- 1.Qh4?
- threat
- 2.Qxd4#
- 2.Qe4#
- 2.Qf4#
- 2.exd4#
- 1...Qxc4
- 2.Sxc4#
- 2.Qe4#
- 2.Qf4#
- 1...Rxb8
- 2.Qf4#
- 1...Rb1
- 2.Qe4#
- 2.Qf4#
- 1...Ra2
- 2.Rxc6#
- 2.Qe4#
- 2.Qf4#
- 1...Rc2
- 2.Rxc6#
- 2.Qe4#
- 2.Qf4#
- 1...Rd2
- 2.Rxc6#
- 2.Qe4#
- 2.Qf4#
- 1...Re2
- 2.Rxc6#
- 2.Qe4#
- 2.Qf4#
- 1...Rf2
- 2.Rxc6#
- 2.Qe4#
- 2.Qf4#
- 1...Rg2
- 2.Rxc6#
- 2.Qe4#
- 2.Qf4#
- 1...Rb3
- 2.Qe4#
- 2.Qf4#
- 1...Rb4
- 2.Qe4#
- 2.Qf4#
- 1...Rb5
- 2.Qe4#
- 2.Qf4#
- 1...Rb6
- 2.Qe4#
- 2.Qf4#
- 1...Rb7
- 2.Qe4#
- 2.Qf4#
- 1...Rf5
- 2.Qxd4#
- 2.Qe4#
- 2.exd4#
- 1...Sc2
- 2.Qe4#
- 2.Qf4#
- 1...Se2
- 2.Sxf3#
- 2.Qe4#
- 1...Sb3
- 2.Rxc6#
- 2.Qe4#
- 2.Qf4#
- 1...Sb5
- 2.Sxc6#
- 2.Qe4#
- 2.Qf4#
- 1...Sf5
- 2.Qe4#
- 2.Qf4#
- 1...Se6
- 2.Rd5#
- 2.Qe4#
- 1...c5
- 2.Rb6#
- 2.Qe4#
- 2.Qf4#
- 1...f5
- 2.Qxd4#
- 2.Qf4#
- 2.exd4#
- 1...Rg4!
- threat
- 1.Qxg5+?
- 1...Sf5
- 2.Qf4#
- 2.Qxf5#
- 1...f5
- 2.Qf4#
- 2.exd4#
- 1...fxg5!
- 1...Sf5
- 1.Rd7+?
- Keys
- 1.Rg4!
- threat
- 2.exd4#
- 1...Qxc4
- 2.Sxc4#
- 1...Rxb8
- 2.Qxh2#
- 1...Rb1
- 2.Qxh2#
- 1...Ra2
- 2.Rxc6#
- 1...Rc2
- 2.Rxc6#
- 1...Rd2
- 2.Rxc6#
- 1...Re2
- 2.Rxc6#
- 1...Rf2
- 2.Rxc6#
- 1...Rg2
- 2.Rxc6#
- 1...Rb3
- 2.Qxh2#
- 1...Rb4
- 2.Qxh2#
- 1...Rb5
- 2.Qxh2#
- 1...Rb6
- 2.Qxh2#
- 1...Rb7
- 2.Qxh2#
- 1...Sc2
- 2.Qxh2#
- 1...Se2
- 2.Sxf3#
- 1...Sb3
- 2.Rxc6#
- 1...Sb5
- 2.Sxc6#
- 1...Sf5
- 2.Re4#
- 1...Se6
- 2.Rd5#
- 1...c5
- 2.Rb6#
- threat
- 1.Rg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 1
- Sets
- Q(f);XP(F)::S(G),XQ(f)
- R(c);N_GUARD::B(J)+R(I),XP(j)
- B(b);S_CUTR(c)::B(J)+R(I),XP(j)
- S(g);N_GUARD,S_CUTB(b)::S(A),XP(e)
- S(g);S_CUTR(c)::B(J)+R(I),XP(j)
- S(g);N_GUARD,S_CUTQ(f)::S(G),XP(j)
- S(g);SBLOCK::B(J)+R(I),DCHECK
- P(j);OGATE::B(J)+R(I)
- Tries
- Try
- R(I);CHECK
- Vars
- K(h);N_SPINR(i),P-FLIGHT::QAB1(H)
- Refutation
- R(c);XB(J)
- Try
- Q(H);N_PINR(i)
- Threat
- DUALS(6)
- Vars
- R(c);XB(J)::QAB1(H)
- Refutation
- R(i);XQ(H)
- Try
- Q(H);N_PINR(i)
- Threat
- DUALS(2)
- Refutation
- R(c);XB(J)
- Try
- Q(H);CHECK,N_PINR(i)
- Refutation
- S(l);P_SPINS(l)
- Try
- Q(H);N_PINR(i)
- Threat
- DUALS(4)
- Vars
- R(c);XB(J)::QAB1(H)
- Refutation
- R(i);
- Try
- Q(H);CHECK,XR(i)
- Refutation
- P(k);XQ(H)
- Try
- Actual
- R(E);
- Threat
- P(D),XS(g)
- Vars
- Q(f);XP(F)::S(G),XQ(f)
- R(c);N_GUARD,XB(J)::QAB(H),XP(d)
- R(c);N_GUARD::QAB(H),XP(d)
- R(c);N_GUARD::B(J)+R(I),XP(j)
- S(g);S_CUTR(c)::QAB(H),XP(d)
- S(g);N_GUARD,S_CUTB(b)::S(A),XP(e)
- S(g);S_CUTR(c)::B(J)+R(I),XP(j)
- S(g);N_GUARD,S_CUTQ(f)::S(G),XP(j)
- S(g);N_SPINR(i),SBLOCK::R1(E)
- S(g);SBLOCK::B(J)+R(I),DCHECK
- P(j);OGATE::B(J)+R(I)
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).