MESON Chess Problem Database
Problem Display
PID: 175512 (5rb1/1Q5N/8/1P1R2P1/4kP2/1n2p3/4N1K1/8 w - - 0 1)
Gasser, A
San Francisco Chronicle, 1899
#2
8 + 5
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rxf4
- 2.Sc3#
- 2.Sg3#
- 1...Rf5
- 2.Rd4#
- 1...Rf6
- 2.Sxf6#
- 1...Ra8
- 2.Sf6#
- 1...Rb8
- 2.Sf6#
- 1...Rc8
- 2.Sf6#
- 1...Rd8
- 2.Sf6#
- 1...Re8
- 2.Sf6#
- 1...Bf7
- 2.Sf6#
- 1...Rxf4
- Tries
- 1.Rd1+?
- 1...Bd5
- 2.Qxd5#
- 1...Kf5!
- 1...Bd5
- 1.Rd2+?
- 1...Bd5
- 2.Qxd5#
- 1...Kf5!
- 1...Bd5
- 1.Rc5+?
- 1...Bd5
- 2.Qxd5#
- 1...Kd3!
- 1...Bd5
- 1.Rd6+?
- 1...Bd5
- 2.Qxd5#
- 1...Kf5!
- 1...Bd5
- 1.Rd7+?
- 1...Bd5
- 2.Qxd5#
- 1...Kf5!
- 1...Bd5
- 1.Rd8+?
- 1...Bd5
- 2.Qxd5#
- 1...Kf5!
- 1...Bd5
- 1.Qc7?
- threat
- 2.Sc3#
- 2.Qe5#
- 1...Kxd5
- 2.Qc6#
- 1...Bxd5
- 2.Qc2#
- 1...Rf5
- 2.Sc3#
- 1...Re8
- 2.Sc3#
- 2.Sf6#
- 1...Sd4!
- threat
- 1.Qd7?
- threat
- 2.Re5#
- 1...Rxf4
- 2.Sc3#
- 2.Sg3#
- 1...Sd4
- 2.Rxd4#
- 1...Rf5
- 2.Qxf5#
- 1...Re8
- 2.Sf6#
- 2.Qf5#
- 1...Bxd5!
- threat
- 1.Qe7+?
- 1...Be6
- 2.Qxe6#
- 1...Kxd5!
- 1...Be6
- 1.Qf7?
- threat
- 2.Sc3#
- 2.Sg3#
- 2.Sf6#
- 1...Bxf7
- 2.Sf6#
- 1...Bxh7
- 2.Sc3#
- 2.Sg3#
- 2.Qe6#
- 1...Sd4
- 2.Rxd4#
- 1...Rc8
- 2.Sg3#
- 2.Sf6#
- 2.Qf5#
- 1...Rxf7!
- threat
- 1.Rd1+?
- Keys
- 1.Qc8!
- 1...Kxd5
- 2.Qc6#
- 1...Rxf4
- 2.Sc3#
- 1...Rxc8
- 2.Sf6#
- 1...Bxd5
- 2.Qc2#
- 1...Bxh7
- 2.Qe6#
- 1...Sd4
- 2.Rxd4#
- 1...Rf5
- 2.Qxf5#
- 1...Rf6
- 2.Sxf6#
- 1...Rf7
- 2.Qe6#
- 1...Rd8
- 2.Sf6#
- 2.Qf5#
- 1...Re8
- 2.Sf6#
- 2.Qf5#
- 1...Be6
- 2.Qxe6#
- 1...Bf7
- 2.Sf6#
- 2.Qf5#
- 1...Sa1
- 2.Rd4#
- 2.Qc4#
- 1...Sc1
- 2.Rd4#
- 2.Qc4#
- 1...Sd2
- 2.Rd4#
- 1...Sa5
- 2.Rd4#
- 1...Sc5
- 2.Rd4#
- 1...Kxd5
- 1.Qc8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 10
- REMOVED MATES = 5
- Sets
- R(d);SBLOCK::QAB(G)+R(E),DCHECK
- R(d);N_GUARD::S(H),XR(d)
- R(d);N_GUARD::S(H)
- B(e);S_CUTR(d)::S(H)
- Tries
- Try
- R(E);CHECK
- Vars
- B(e);N_GUARD,P_SPINB(e)::QAB1(G),XB(e)
- Refutation
- K(c);S_FLIGHT
- Try
- R(E);CHECK
- Vars
- B(e);N_GUARD,P_SPINB(e)::QAB1(G),XB(e)
- Refutation
- K(c);S_FLIGHT
- Try
- R(E);CHECK
- Vars
- B(e);N_GUARD,P_SPINB(e)::QAB1(G),XB(e)
- Refutation
- K(c);S_FLIGHT
- Try
- R(E);CHECK
- Vars
- B(e);N_GUARD,P_SPINB(e)::QAB1(G),XB(e)
- Refutation
- K(c);S_FLIGHT
- Try
- R(E);CHECK
- Vars
- B(e);N_GUARD,P_SPINB(e)::QAB1(G),XB(e)
- Refutation
- K(c);S_FLIGHT
- Try
- R(E);CHECK
- Vars
- B(e);N_GUARD,P_SPINB(e)::QAB1(G),XB(e)
- Refutation
- K(c);S_FLIGHT
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- K(c);OGATEB,S_FLIGHT,XR(E)::QAB1(G)
- B(e);SBLOCK,XR(E)::QAB(G)
- R(d);::S(A)
- Refutation
- S(a);
- Try
- Q(G);
- Threat
- R1(E)
- Vars
- S(a);N_GUARD::R1(E),XS(a)
- R(d);N_GUARD::QAB1(G),XR(d)
- Refutation
- B(e);XR(E)
- Try
- Q(G);CHECK
- Vars
- B(e);N_GUARD,P_SPINB(e)::QAR2(G),XB(e)
- Refutation
- K(c);S_FLIGHT,XR(E)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- B(e);XQ(G)::S(H)
- S(a);N_GUARD::R1(E),XS(a)
- Refutation
- R(d);XQ(G)
- Try
- Actual
- Q(G);
- Vars
- K(c);OGATEB,S_FLIGHT,XR(E)::QAB1(G)
- R(d);SBLOCK,XP(C)::S(A)
- R(d);N_GUARD,XQ(G)::S(H)
- B(e);SBLOCK,XR(E)::QAB(G)
- B(e);N_GUARD,XS(H)::QAR2(G)
- S(a);N_GUARD::R1(E),XS(a)
- R(d);N_GUARD::QAB1(G),XR(d)
- R(d);N_GUARD::S(H),XR(d)
- R(d);S_CUTB(e)::QAR2(G)
- B(e);N_GUARD::QAR2(G),XB(e)
- S(a);N_GUARD::R1(E)
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).