MESON Chess Problem Database
Problem Display
PID: 175435 (8/8/1Q2Np2/1NPqpk1K/4R3/8/B2P2P1/8 w - - 0 1)
Riera y Rique, Pedro
Ruy Lopez, 1899
#2
9 + 4
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxe4
- 2.Sd6#
- 1...Qb7
- 2.Sd6#
- 1...Qa8
- 2.Sd6#
- 1...Qd6
- 2.Sxd6#
- 1...Qxe4
- Tries
- 1.Sc3?
- threat
- 2.Sg7#
- 2.g4#
- 1...Qxe6
- 2.Bxe6#
- 2.Qxe6#
- 2.g4#
- 1...Qb7
- 2.g4#
- 1...Qd7
- 2.g4#
- 1...Qxe4!
- threat
- 1.Bb1?
- threat
- 2.Sg7#
- 2.Rf4#
- 2.g4#
- 1...Qxe4
- 2.g4#
- 1...Qxe6
- 2.g4#
- 1...Qc6
- 2.Sg7#
- 1...Qd6
- 2.Sg7#
- 1...Qb7
- 2.Rf4#
- 2.g4#
- 1...Qd7
- 2.Rf4#
- 2.g4#
- 1...Qd3!
- threat
- 1.Qc6?
- 1...Kxe4
- 2.Bb1#
- 1...Qxa2
- 2.Sg7#
- 2.g4#
- 1...Qxe4
- 2.Sd6#
- 1...Qxe6
- 2.Bxe6#
- 2.g4#
- 1...Qxd2
- 2.Sg7#
- 2.g4#
- 1...Qxc5
- 2.Sg7#
- 2.g4#
- 1...Qb3
- 2.Sg7#
- 2.g4#
- 1...Qc4
- 2.Sg7#
- 2.g4#
- 1...Qd3
- 2.Sg7#
- 2.g4#
- 1...Qd4
- 2.Sg7#
- 2.g4#
- 1...Qd6
- 2.Sxd6#
- 2.Sg7#
- 2.g4#
- 1...Qd7
- 2.g4#
- 1...Qd8
- 2.Sg7#
- 2.g4#
- 1...Qxc6!
- 1...Kxe4
- 1.d3?
- threat
- 2.Sg7#
- 2.g4#
- 1...Qxe4
- 2.Sd6#
- 1...Qxe6
- 2.Bxe6#
- 2.Qxe6#
- 2.g4#
- 1...Qb7
- 2.Sd6#
- 2.g4#
- 1...Qd7
- 2.g4#
- 1...Qxd3!
- threat
- 1.Sc3?
- Keys
- 1.Qb7!
- 1...Kxe4
- 2.Bb1#
- 1...Kxe6
- 2.Sd4#
- 1...Qxa2
- 2.Sg7#
- 1...Qxe4
- 2.Sd6#
- 2.Qh7#
- 1...Qxe6
- 2.Qh7#
- 2.g4#
- 1...Qxb7
- 2.Sd6#
- 1...Qxd2
- 2.Sg7#
- 2.Qh7#
- 2.g4#
- 1...Qxc5
- 2.Sg7#
- 2.Qh7#
- 2.g4#
- 1...Qb3
- 2.Sg7#
- 1...Qc4
- 2.Sg7#
- 1...Qc6
- 2.Qh7#
- 1...Qd3
- 2.Sg7#
- 2.Qh7#
- 2.g4#
- 1...Qd4
- 2.Sg7#
- 2.Qh7#
- 2.g4#
- 1...Qd6
- 2.Sxd6#
- 2.Sg7#
- 2.Qh7#
- 2.g4#
- 1...Qd7
- 2.g4#
- 1...Qd8
- 2.Sg7#
- 2.Qh7#
- 2.g4#
- 1...Kxe4
- 1.Qb7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 3
- Sets
- Q(a);N_GUARD,XR(D)::S(E)
- Q(a);N_GUARD::S(E)
- Q(a);N_GUARD::S(E),XQ(a)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(a);::P(C)
- Refutation
- Q(a);XR(D)
- Try
- B(A);
- Threat
- DUALS(3)
- Vars
- Q(a);P_SPINQ(a),XR(D)::P(C)
- Q(a);XS(I)::P(C)
- Q(a);::S(I)
- Refutation
- Q(a);
- Try
- Q(H);
- Vars
- K(c);OGATEB,P_SPINQ(a),S_FLIGHT,XR(D)::B(A)
- Q(a);N_GUARD,XR(D)::S(E)
- Q(a);::P(C)
- Refutation
- Q(a);XQ(H)
- Try
- P(B);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,XR(D)::S(E)
- Q(a);::P(C)
- Refutation
- Q(a);XP(B)
- Try
- Actual
- Q(H);
- Vars
- K(c);OGATEB,P_SPINQ(a),S_FLIGHT,XR(D)::B(A)
- K(c);P_SPINP(b),P_SPINQ(a),S_FLIGHT,XS(I)::S(E)
- Q(a);XB(A)::S(I)
- Q(a);N_GUARD,XQ(H)::S(E)
- Q(a);::S(I)
- Q(a);::QAB(H)
- Q(a);::P(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).