MESON Chess Problem Database
Problem Display
PID: 223090 (2N2b2/1r4p1/6Q1/nP1kp3/8/p1R2Pp1/P1N3K1/5nB1 w - - 0 1)
Phelps, Francis Bradley
San Francisco Argonaut, 1885
#2
9 + 9
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxb5
- 2.Qf7#
- 1...Rb6
- 2.Sxb6#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb4#
- 2.Sb6#
- 2.Rc5#
- 2.Qd6#
- 1...Rf7
- 2.Sb6#
- 2.Qxf7#
- 1...Rb8
- 2.Qf7#
- 1...Bb4
- 2.Sxb4#
- 1...Bc5
- 2.Rxc5#
- 1...Bd6
- 2.Qxd6#
- 1...Be7
- 2.Qf7#
- 1...Sb3
- 2.Qc6#
- 1...Sc4
- 2.Rd3#
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...e4
- 2.Qxe4#
- 2.Qf5#
- 1...Rxb5
- Tries
- 1.Kxf1?
- 1...Rxb5
- 2.Qf7#
- 1...e4
- 2.Qxe4#
- 2.Qf5#
- 1...Rb6
- 2.Sxb6#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb4#
- 2.Sb6#
- 2.Rc5#
- 2.Qd6#
- 1...Rf7
- 2.Sb6#
- 2.Qxf7#
- 1...Rb8
- 2.Qf7#
- 1...Bb4
- 2.Sxb4#
- 1...Bc5
- 2.Rxc5#
- 1...Bd6
- 2.Qxd6#
- 1...Be7
- 2.Qf7#
- 1...Sb3
- 2.Qc6#
- 1...Sc4
- 2.Rd3#
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...g2+!
- 1...Rxb5
- 1.Se3+?
- 1...Kd4
- 2.Qd3#
- 1...Sxe3+!
- 1...Kd4
- 1.Sd4?
- threat
- 2.Qe4#
- 2.Qe6#
- 1...exd4
- 2.Qe4#
- 2.Qf5#
- 1...Sc4
- 2.Qc6#
- 1...e4
- 2.Qxe4#
- 2.Qf5#
- 2.Qg5#
- 2.Qe6#
- 1...Sd2
- 2.Qe6#
- 1...Rb6
- 2.Sxb6#
- 2.Qe4#
- 1...Re7
- 2.Sb6#
- 2.Qe4#
- 2.Qd6#
- 1...Se3+!
- threat
- 1.Se7+?
- 1...Rxe7
- 2.Sb4#
- 2.Rc5#
- 1...Bxe7!
- 1...Rxe7
- 1.Rc6?
- threat
- 2.Qd3#
- 2.Qe4#
- 2.Qe6#
- 1...Rxb5
- 2.Qe4#
- 2.Qe6#
- 1...Sxc6
- 2.Qxc6#
- 1...Bc5
- 2.Rxc5#
- 2.Qe4#
- 2.Qe6#
- 1...e4
- 2.Qxe4#
- 2.Qf5#
- 2.Qg5#
- 2.Qe6#
- 1...Sd2
- 2.Qd3#
- 2.Qe6#
- 1...Re7
- 2.Sb4#
- 2.Sb6#
- 2.Rc5#
- 2.Qd3#
- 2.Qe4#
- 2.Qd6#
- 1...Bd6
- 2.Qxd6#
- 1...Sb3
- 2.Qe4#
- 2.Qe6#
- 1...Se3+!
- threat
- 1.Rc7?
- threat
- 2.Qf7#
- 1...Rxc7
- 2.Sb6#
- 1...e4
- 2.Qxe4#
- 2.Qf5#
- 1...Rb6
- 2.Sxb6#
- 1...Se3+!
- threat
- 1.Qg4?
- threat
- 2.Rd3#
- 1...Se3+
- 2.Sxe3#
- 1...e4
- 2.Qf5#
- 2.Qxe4#
- 1...Bc5
- 2.Rxc5#
- 1...Sb3
- 2.Qc4#
- 1...Sc6
- 2.Qc4#
- 1...Rxb5!
- threat
- 1.Kxf1?
- Keys
- 1.Ba7!
- 1...Se3+
- 2.Sxe3#
- 1...Rxb5
- 2.Qf7#
- 1...Rxa7
- 2.Sb6#
- 1...e4
- 2.Qxe4#
- 2.Qf5#
- 1...Sd2
- 2.Se3#
- 1...Rb6
- 2.Sxb6#
- 1...Rc7
- 2.Sb6#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb4#
- 2.Sb6#
- 2.Rc5#
- 2.Qd6#
- 1...Rf7
- 2.Sb6#
- 2.Qxf7#
- 1...Rb8
- 2.Qf7#
- 1...Bb4
- 2.Sxb4#
- 1...Bc5
- 2.Rxc5#
- 1...Bd6
- 2.Qxd6#
- 1...Be7
- 2.Qf7#
- 1...Sh2
- 2.Se3#
- 1...Sb3
- 2.Qc6#
- 1...Sc4
- 2.Rd3#
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Se3+
- 1.Ba7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(g);N_GUARD,XP(G)::QAB(H)
- R(g);N_GUARD::S(I),XR(g)
- R(g);N_GUARD::S(I)
- R(g);N_GUARD::QAB(H)
- B(i);N_GUARD::S(C),XB(i)
- B(i);N_GUARD::R1(E),XB(i)
- B(i);N_GUARD::QAR1(H),XB(i)
- B(i);S_CUTR(g)::QAB(H)
- S(d);N_GUARD::QAB1(H)
- S(d);N_GUARD::QAB1(H),XS(d)
- Tries
- Try
- K(D);S_FLIGHT,XS(a)
- Vars
- R(g);N_GUARD,XP(G)::QAB(H)
- R(g);N_GUARD::S(I),XR(g)
- R(g);N_GUARD::S(I)
- R(g);N_GUARD::QAB(H)
- B(i);N_GUARD::S(C),XB(i)
- B(i);N_GUARD::R1(E),XB(i)
- B(i);N_GUARD::QAR1(H),XB(i)
- B(i);S_CUTR(g)::QAB(H)
- S(d);N_GUARD::QAB1(H)
- S(d);N_GUARD::QAB1(H),XS(d)
- Refutation
- P(c);CHECK
- Try
- S(C);CHECK
- Vars
- K(e);P-FLIGHT::QAR1(H)
- Refutation
- S(a);CHECK,XS(C)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- S(d);N_GUARD::QAB1(H)
- S(a);::QAB1(H)
- Refutation
- S(a);CHECK
- Try
- S(I);CHECK
- Refutation
- B(i);XS(I)
- Try
- R(E);
- Threat
- DUALS(3)
- Vars
- S(d);OGATE,XR(E)::QAB1(H),XS(d)
- B(i);N_GUARD::QAR1(H),XB(i)
- Refutation
- S(a);CHECK
- Try
- R(E);
- Threat
- QAB(H)
- Vars
- R(g);N_GUARD,XR(E)::S(I)
- R(g);N_GUARD::S(I),XR(g)
- Refutation
- S(a);CHECK
- Try
- Q(H);
- Threat
- R(E)
- Vars
- S(a);CHECK,N_GUARD::S(C),XS(a)
- B(i);N_GUARD::R1(E),XB(i)
- S(d);N_GUARD::QAB1(H)
- Refutation
- R(g);XP(G)
- Try
- Actual
- B(A);
- Vars
- S(a);CHECK,N_GUARD::S(C),XS(a)
- R(g);N_GUARD,XP(G)::QAB(H)
- R(g);N_GUARD,XB(A)::S(I)
- S(a);N_GUARD::S(C)
- R(g);N_GUARD::S(I),XR(g)
- R(g);N_GUARD::S(I)
- R(g);N_GUARD::QAB(H)
- B(i);N_GUARD::S(C),XB(i)
- B(i);N_GUARD::R1(E),XB(i)
- B(i);N_GUARD::QAR1(H),XB(i)
- B(i);S_CUTR(g)::QAB(H)
- S(d);N_GUARD::QAB1(H)
- S(d);N_GUARD::QAB1(H),XS(d)
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).