MESON Chess Problem Database
Problem Display
PID: 228856 (n4NB1/1K1Q1rq1/3b2n1/3k4/2R1Rr2/1N6/b7/8 w - - 0 1)
Boros, Sandor
Sp. Prize, Allgemeine Zeitung Chemnitz, 1926
#2
7 + 8
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qd4
- 2.Rcxd4#
- 1...Qh6
- 2.Rcd4#
- 1...Qxf8
- 2.Rcd4#
- 1...Qh7
- 2.Rcd4#
- 1...Qxg8
- 2.Rcd4#
- 1...Rxe4
- 2.Rc5#
- 1...Rf6
- 2.Rcd4#
- 1...Se5
- 2.Rcd4#
- 1...Se7
- 2.Qe6#
- 1...Sc7
- 2.Qc6#
- 1...Qd4
- Tries
- 1.Ka6?
- threat
- 2.Qc6#
- 2.Qe6#
- 2.Qb7#
- 1...Qxg8
- 2.Rcd4#
- 2.Qc6#
- 2.Qe6#
- 1...Rxe4
- 2.Rc5#
- 1...Sxf8
- 2.Qc6#
- 2.Qb7#
- 1...Qd4
- 2.Rcxd4#
- 2.Qc6#
- 2.Qe6#
- 1...Qe5
- 2.Qc6#
- 2.Qb7#
- 1...Qf6
- 2.Qc6#
- 2.Qb7#
- 1...Rf6
- 2.Rcd4#
- 2.Qc6#
- 2.Qb7#
- 1...Se5
- 2.Rcd4#
- 2.Qe6#
- 1...Se7
- 2.Qe6#
- 1...Sc7+!
- threat
- 1.Kxa8?
- threat
- 2.Qc6#
- 2.Qe6#
- 2.Qb7#
- 1...Qxg8
- 2.Rcd4#
- 2.Qc6#
- 2.Qe6#
- 1...Rxe4
- 2.Rc5#
- 1...Sxf8
- 2.Qc6#
- 2.Qb7#
- 1...Qd4
- 2.Rcxd4#
- 2.Qc6#
- 2.Qe6#
- 1...Qe5
- 2.Qc6#
- 2.Qb7#
- 1...Qf6
- 2.Qc6#
- 2.Qb7#
- 1...Rf6
- 2.Rcd4#
- 2.Qc6#
- 2.Qb7#
- 1...Se5
- 2.Rcd4#
- 2.Qe6#
- 1...Se7
- 2.Qe6#
- 1...Qxf8+!
- threat
- 1.Bxf7+?
- 1...Qxf7
- 2.Rcd4#
- 1...Rxf7!
- 1...Qxf7
- 1.Re7?
- threat
- 2.Rc5#
- 2.Qc6#
- 2.Qe6#
- 1...Rxc4
- 2.Qe6#
- 1...Bxb3
- 2.Qc6#
- 2.Qe6#
- 1...Sxe7
- 2.Qe6#
- 1...Sxf8
- 2.Rc5#
- 2.Qc6#
- 1...Qc3
- 2.Qc6#
- 2.Qe6#
- 1...Qd4
- 2.Qc6#
- 2.Qe6#
- 1...Qe5
- 2.Qc6#
- 1...Qf6
- 2.Rc5#
- 2.Qc6#
- 1...Re4
- 2.Rc5#
- 2.Qc6#
- 1...Rf6
- 2.Rd4#
- 2.Rc5#
- 2.Qc6#
- 1...Se5
- 2.Qe6#
- 1...Sc7
- 2.Rc5#
- 2.Qc6#
- 1...Kxc4!
- threat
- 1.Ka6?
- Keys
- 1.Ka7!
- threat
- 2.Qb7#
- 1...Qd4+
- 2.Rcxd4#
- 1...Qxg8
- 2.Rcd4#
- 1...Rxe4
- 2.Rc5#
- 1...Se5
- 2.Rcd4#
- 1...Se7
- 2.Qe6#
- 1...Sc7
- 2.Qc6#
- threat
- 1.Ka7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- Q(g);N_GUARD::R1(B),XQ(g)
- Q(g);N_GUARD::R1(B)
- Q(g);N_GUARD,XS(F)::R1(B)
- Q(g);N_GUARD,N_SPINR(f),XB(G)::R1(B)
- R(b);SBLOCK,XR(C)::R1(B)
- R(b);S_CUTQ(g)::R1(B)
- S(e);S_CUTQ(g)::R1(B)
- S(e);N_PINQ(E)::QAB1(E)
- S(h);N_PINQ(E)::QAB1(E)
- Tries
- Try
- K(D);N_SPINQ(E),S_FLIGHT
- Threat
- DUALS(3)
- Vars
- R(b);SBLOCK,XR(C)::R1(B)
- S(e);::QAB1(E)
- Refutation
- S(h);CHECK
- Try
- K(D);N_SPINQ(E),S_FLIGHT,XS(h)
- Threat
- DUALS(3)
- Vars
- R(b);SBLOCK,XR(C)::R1(B)
- S(e);::QAB1(E)
- Refutation
- Q(g);CHECK,XS(F)
- Try
- B(G);CHECK,N_SPINQ(E),XR(f)
- Vars
- Q(g);P_PINQ(E),XB(G)::R1(B)
- Refutation
- R(b);P_PINQ(E),XB(G)
- Try
- R(C);N_SPINQ(E)
- Threat
- DUALS(3)
- Vars
- R(b);SBLOCK,XR(B)::QAB1(E)
- S(e);XR(C)::QAB1(E)
- Q(g);::QAB1(E)
- S(e);::QAB1(E)
- Refutation
- K(c);N_SPINB(d),S_FLIGHT,XR(B)
- Try
- Actual
- K(D);P-FLIGHT
- Threat
- QAB(E)
- Vars
- Q(g);CHECK,N_GUARD::R1(B),XQ(g)
- Q(g);N_GUARD,N_SPINR(f),XB(G)::R1(B)
- R(b);SBLOCK,XR(C)::R1(B)
- S(e);S_CUTQ(g)::R1(B)
- S(e);N_PINQ(E)::QAB1(E)
- S(h);N_PINQ(E)::QAB1(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).