MESON Chess Problem Database
Problem Display
PID: 201496 (b1BB1rn1/b4P2/Rq1k4/3pp3/1p1N2N1/1PR3p1/8/1rQ2nK1 w - - 0 1)
Rivera, Luis G
L'Alfiere di Re, 1922
#2
10 + 12
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Re8
- 2.fxe8S#
- 1...Se3
- 2.Sb5#
- 1...Sh6
- 2.Qxh6#
- 1...Se7
- 2.Bc7#
- 1...bxc3
- 2.Qa3#
- 1...exd4
- 2.Qf4#
- 1...e4
- 2.Qf4#
- 1...Re8
- Tries
- 1.Kh1?
- threat
- 2.Sb5#
- 2.Sf5#
- 1...Qxa6
- 2.Sf5#
- 1...Rxf7
- 2.Sb5#
- 1...Rxd8
- 2.Sf5#
- 1...bxc3
- 2.Qa3#
- 1...exd4
- 2.Qf4#
- 1...Bc6
- 2.Sf5#
- 1...Se3
- 2.Sb5#
- 1...Sh6
- 2.Sb5#
- 2.Qxh6#
- 1...Se7
- 2.Sb5#
- 2.Bc7#
- 1...g2+!
- threat
- 1.Sf2?
- threat
- 2.Sb5#
- 2.Sf5#
- 1...Qxa6
- 2.Sf5#
- 1...Rxf7
- 2.Sb5#
- 1...Rxd8
- 2.Sf5#
- 1...bxc3
- 2.Qa3#
- 1...exd4
- 2.Qf4#
- 1...e4
- 2.Qf4#
- 1...Bc6
- 2.Sf5#
- 1...Se3
- 2.Sb5#
- 1...Sh6
- 2.Sb5#
- 2.Qxh6#
- 1...Se7
- 2.Sb5#
- 2.Bc7#
- 1...gxf2+!
- threat
- 1.Re3?
- threat
- 2.Sb5#
- 2.Sf5#
- 2.Qc7#
- 1...Qxa6
- 2.Sf5#
- 2.Qc7#
- 1...Rxf7
- 2.Sb5#
- 1...Rxd8
- 2.Sf5#
- 1...Sxe3
- 2.Sb5#
- 1...exd4
- 2.Bc7#
- 2.Re6#
- 2.Qc7#
- 1...Qc6
- 2.Sb5#
- 2.Sf5#
- 1...Bb8
- 2.Sb5#
- 2.Sf5#
- 1...Bc6
- 2.Sf5#
- 1...Sd2
- 2.Sb5#
- 2.Sf5#
- 1...Sh2
- 2.Sb5#
- 2.Sf5#
- 1...Sh6
- 2.Sb5#
- 2.Qc7#
- 1...Se7
- 2.Sb5#
- 2.Bc7#
- 2.Qc7#
- 1...Rxc1!
- threat
- 1.Rxb6+?
- 1...Bc6
- 2.Sb5#
- 2.Sf5#
- 2.Rcxc6#
- 2.Rbxc6#
- 1...Bxb6!
- 1...Bc6
- 1.Qh6+?
- 1...Sf6
- 2.Qxf8#
- 2.Qxf6#
- 1...Sxh6!
- 1...Sf6
- 1.Kh1?
- Keys
- 1.Sh6!
- threat
- 2.Sf5#
- 1...Rxf7
- 2.Sxf7#
- 1...Sxh6
- 2.Qxh6#
- 1...bxc3
- 2.Qa3#
- 1...exd4
- 2.Qf4#
- 1...e4
- 2.Qf4#
- 1...Se3
- 2.Sb5#
- 1...Se7
- 2.Bc7#
- threat
- 1.Sh6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- R(k);OGATE::PXR(k)=S
- S(b);N_PINS(E),P_PINQ(A)::S(E)
- S(l);N_GUARD::QAR(A),XS(l)
- S(l);SBLOCK::B(J)
- P(d);OGATEB,XR(D)::QAB(A)
- P(f);OGATEB,XS(E)::QAB(A)
- P(f);OGATEB::QAB(A)
- Tries
- Try
- K(B);N_SPINS(E),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(g);N_SPINQ(g),XR(G)::S(E)
- R(k);XP(H)::S(E)
- R(k);XB(J)::S(E)
- P(d);OGATEB,XR(D)::QAB(A)
- P(f);OGATEB,XS(E)::QAB(A)
- B(j);N_SPINQ(g)::S(E)
- S(b);P_PINQ(A)::S(E)
- Refutation
- P(c);CHECK
- Try
- S(F);N_SPINS(E)
- Threat
- DUALS(2)
- Vars
- Q(g);N_SPINQ(g),XR(G)::S(E)
- R(k);XP(H)::S(E)
- R(k);XB(J)::S(E)
- P(d);OGATEB,XR(D)::QAB(A)
- P(f);OGATEB,XS(E)::QAB(A)
- P(f);OGATEB::QAB(A)
- B(j);N_SPINQ(g)::S(E)
- S(b);P_PINQ(A)::S(E)
- Refutation
- P(c);CHECK,XS(F)
- Try
- R(D);N_SPINS(E)
- Threat
- DUALS(3)
- Vars
- R(k);XP(H)::S(E)
- R(k);XB(J)::S(E)
- S(b);P_PINQ(A),XR(D)::S(E)
- B(j);N_SPINQ(g)::S(E)
- Refutation
- R(a);XQ(A)
- Try
- R(G);CHECK,N_SPINS(E),XQ(g)
- Refutation
- B(i);P_PINS(E),XR(G)
- Try
- Q(A);CHECK
- Refutation
- S(l);XQ(A)
- Try
- Actual
- S(F);
- Threat
- S(F)
- Vars
- R(k);XP(H)::S(F),XR(k)
- S(l);OGATE,XS(F)::QAR(A),XS(l)
- P(d);OGATEB,XR(D)::QAB(A)
- P(f);OGATEB,XS(E)::QAB(A)
- P(f);OGATEB::QAB(A)
- S(b);N_PINS(E),P_PINQ(A)::S(E)
- S(l);SBLOCK::B(J)
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).