MESON Chess Problem Database
Problem Display
PID: 170065 (Q4R2/8/1p3b1r/pK1N3r/1RNk4/2p5/2P3B1/8 w - - 0 1)
Sebastia, V
Enroque!!, 1948
#2
8 + 7
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rxd5+
- 2.Qxd5#
- 1...Re5
- 2.Sxa5#
- 1...Bh4
- 2.Rf4#
- 1...Be5
- 2.Sxa5#
- 1...Be7
- 2.Rf4#
- 1...Bg7
- 2.Rf4#
- 1...Bd8
- 2.Rf4#
- 1...Bh8
- 2.Rf4#
- 1...Rxd5+
- Tries
- 1.Se5+?
- 1...axb4
- 2.Sc6#
- 1...Kxe5!
- 1...axb4
- 1.Re8?
- threat
- 2.Sxa5#
- 2.Re4#
- 1...Rxd5+
- 2.Qxd5#
- 1...axb4
- 2.Re4#
- 1...Rh4
- 2.Sxa5#
- 1...Re5
- 2.Sxa5#
- 1...Be5
- 2.Sxa5#
- 1...a4
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sxb6#
- 2.Sd6#
- 2.Re4#
- 1...Be7!
- threat
- 1.Qc6?
- threat
- 2.Qxb6#
- 1...Rxd5+
- 2.Qxd5#
- 1...Bh4
- 2.Rf4#
- 1...Be5
- 2.Sxa5#
- 1...Be7
- 2.Rf4#
- 1...Bg7
- 2.Rf4#
- 1...Bd8
- 2.Rf4#
- 1...Bh8
- 2.Rf4#
- 1...Bg5!
- threat
- 1.Qb7?
- threat
- 2.Qxb6#
- 1...Rxd5+
- 2.Qxd5#
- 1...Bh4
- 2.Rf4#
- 1...Be5
- 2.Sxa5#
- 1...Be7
- 2.Rf4#
- 1...Bg7
- 2.Rf4#
- 1...Bd8
- 2.Rf4#
- 1...Bh8
- 2.Rf4#
- 1...Bg5!
- threat
- 1.Qb8?
- threat
- 2.Sxa5#
- 2.Qf4#
- 2.Qxb6#
- 1...axb4
- 2.Qf4#
- 2.Qxb6#
- 1...Rh4
- 2.Sxa5#
- 2.Qxb6#
- 1...Re5
- 2.Sxa5#
- 2.Qxb6#
- 1...Rf5
- 2.Sxa5#
- 2.Qxb6#
- 1...Bh4
- 2.Sxa5#
- 2.Rf4#
- 2.Qf4#
- 1...Be5
- 2.Sxa5#
- 1...Bg5
- 2.Sxa5#
- 2.Qe5#
- 1...Be7
- 2.Rf4#
- 2.Qf4#
- 1...Bg7
- 2.Sxa5#
- 2.Rf4#
- 2.Qf4#
- 1...Bd8
- 2.Sxa5#
- 2.Rf4#
- 2.Qf4#
- 1...Bh8
- 2.Sxa5#
- 2.Rf4#
- 2.Qf4#
- 1...a4
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sxb6#
- 2.Qf4#
- 2.Qxb6#
- 1...Rxd5+!
- threat
- 1.Qe8?
- threat
- 2.Sxa5#
- 2.Qe3#
- 2.Qe4#
- 1...axb4
- 2.Qe3#
- 2.Qe4#
- 1...Rh3
- 2.Sxa5#
- 2.Qe4#
- 1...Rh4
- 2.Sxa5#
- 2.Qe3#
- 1...Re5
- 2.Sxa5#
- 1...Be5
- 2.Sxa5#
- 1...Bg5
- 2.Sxa5#
- 2.Qe4#
- 2.Qe5#
- 1...Be7
- 2.Rf4#
- 1...a4
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sxb6#
- 2.Sd6#
- 2.Qe3#
- 2.Qe4#
- 1...Rxd5+!
- threat
- 1.Se5+?
- Keys
- 1.Qd8!
- threat
- 2.Qxb6#
- 1...Rxd5+
- 2.Qxd5#
- 1...Bxd8
- 2.Rf4#
- 1...Bh4
- 2.Rf4#
- 1...Be5
- 2.Sxa5#
- 1...Bg5
- 2.Sf6#
- 1...Be7
- 2.Rf4#
- 1...Bg7
- 2.Rf4#
- 1...Bh8
- 2.Rf4#
- threat
- 1.Qd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- R(d);CHECK,OGATE,XS(F)::QAR1(G),XR(d)
- R(d);SBLOCK::R(C)+S(D),XP(c)
- B(f);OGATE::R(H)
- B(f);N_PINS(F),SBLOCK::R(C)+S(D),XP(c)
- Tries
- Try
- S(D);CHECK,N_SPINS(F)
- Vars
- P(c);XR(C)::S(D)
- Refutation
- K(b);S_FLIGHT,XS(D)
- Try
- R(H);
- Threat
- DUALS(2)
- Vars
- R(d);CHECK,OGATE,XS(F)::QAR1(G),XR(d)
- P(c);XR(C)::R1(H)
- R(d);N_PINS(F)::R(C)+S(D),XP(c)
- R(d);::R(C)+S(D),XP(c)
- B(f);N_PINS(F)::R(C)+S(D),XP(c)
- Refutation
- B(f);
- Try
- Q(G);
- Threat
- QAB(G),XP(e)
- Vars
- R(d);CHECK,OGATE,XS(F)::QAR1(G),XR(d)
- B(f);OGATE::R(H)
- B(f);N_PINS(F),SBLOCK::R(C)+S(D),XP(c)
- Refutation
- B(f);N_PINS(F)
- Try
- Q(G);
- Threat
- QAB(G),XP(e)
- Vars
- R(d);CHECK,OGATE,XS(F)::QAR1(G),XR(d)
- B(f);OGATE::R(H)
- B(f);N_PINS(F),SBLOCK::R(C)+S(D),XP(c)
- Refutation
- B(f);N_PINS(F)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- B(f);N_PINS(F)::R(C)+S(D),XP(c)
- Refutation
- R(d);CHECK,XS(F)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- R(d);::R(C)+S(D),XP(c)
- B(f);N_PINS(F)::R(C)+S(D),XP(c)
- B(f);OGATE::R(H)
- Refutation
- R(d);CHECK,XS(F)
- Try
- Actual
- Q(G);
- Threat
- QAB(G),XP(e)
- Vars
- R(d);CHECK,OGATE,P_SPINR(d),XS(F)::QAR1(G),XR(d)
- B(f);OGATE,XQ(G)::R(H)
- B(f);OGATE::R(H)
- B(f);N_PINS(F),SBLOCK::R(C)+S(D),XP(c)
- B(f);N_PINS(F)::QAR(G)+S(F)
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).