MESON Chess Problem Database
Problem Display
PID: 234093 (5r2/1R3p2/3P1kpP/3Q4/4PP2/5n2/1K6/8 w - - 0 1)
Benko, Pal Charles
Chess Life & Review, 1976
#2
7 + 5
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rb8
- 2.Qxf7#
- 1...Rc8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qe5#
- 1...Sg1
- 2.Qe5#
- 1...Sd2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 2.fxg5#
- 1...g5
- 2.Qf5#
- 1...Ra8
- Tries
- 1.Ka1?
- 1...g5
- 2.Qf5#
- 1...Rb8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rc8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qe5#
- 1...Sg1
- 2.Qe5#
- 1...Sd2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 2.fxg5#
- 1...Ra8+!
- 1...g5
- 1.Kb1?
- 1...g5
- 2.Qf5#
- 1...Ra8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rb8
- 2.Qxf7#
- 1...Rc8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qe5#
- 1...Sg1
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 2.fxg5#
- 1...Sd2+!
- 1...g5
- 1.Kc1?
- 1...g5
- 2.Qf5#
- 1...Ra8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rb8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qe5#
- 1...Sg1
- 2.Qe5#
- 1...Sd2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 2.fxg5#
- 1...Rc8+!
- 1...g5
- 1.Ka2?
- 1...g5
- 2.Qf5#
- 1...Rb8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rc8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qe5#
- 1...Sg1
- 2.Qe5#
- 1...Sd2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 2.fxg5#
- 1...Ra8+!
- 1...g5
- 1.Ka3?
- 1...g5
- 2.Qf5#
- 1...Rb8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rc8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qe5#
- 1...Sg1
- 2.Qe5#
- 1...Sd2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 2.fxg5#
- 1...Ra8+!
- 1...g5
- 1.Kc3?
- 1...g5
- 2.Qf5#
- 1...Ra8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rb8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qe5#
- 1...Sg1
- 2.Qe5#
- 1...Sd2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 2.fxg5#
- 1...Rc8+!
- 1...g5
- 1.Ra7?
- 1...g5
- 2.Qf5#
- 1...Ra8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rc8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qe5#
- 1...Sg1
- 2.Qe5#
- 1...Sd2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 2.fxg5#
- 1...Rb8+!
- 1...g5
- 1.Rc7?
- 1...g5
- 2.Qf5#
- 1...Ra8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rc8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qe5#
- 1...Sg1
- 2.Qe5#
- 1...Sd2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 2.fxg5#
- 1...Rb8+!
- 1...g5
- 1.Rd7?
- 1...g5
- 2.Qf5#
- 1...Ra8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rc8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qe5#
- 1...Sg1
- 2.Qe5#
- 1...Sd2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 2.fxg5#
- 1...Rb8+!
- 1...g5
- 1.Re7?
- 1...g5
- 2.Qf5#
- 1...Ra8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rc8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd8
- 2.Rxf7#
- 2.Qxf7#
- 1...Re8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rg8
- 2.Rxf7#
- 2.Qxf7#
- 1...Rh8
- 2.Rxf7#
- 2.Qxf7#
- 1...Se1
- 2.Qd4#
- 2.Qe5#
- 2.Qg5#
- 1...Sg1
- 2.Qd4#
- 2.Qe5#
- 2.Qg5#
- 1...Sd2
- 2.Qd4#
- 2.Qe5#
- 2.Qg5#
- 1...Sh2
- 2.Qd4#
- 2.Qe5#
- 2.Qg5#
- 1...Sd4
- 2.Qxd4#
- 2.Qe5#
- 2.Qg5#
- 1...Sh4
- 2.Qd4#
- 2.Qe5#
- 2.Qg5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qd4#
- 2.Qe5#
- 2.Qxg5#
- 2.fxg5#
- 1...Rb8+!
- 1...g5
- 1.Qd4+?
- 1...Ke6
- 2.Re7#
- 1...Se5
- 2.Qxe5#
- 1...Sxd4!
- 1...Ke6
- 1.Qg5+?
- 1...Ke6
- 2.Qe7#
- 1...Sxg5!
- 1...Ke6
- 1.e5+?
- 1...Sxe5
- 2.Qxe5#
- 1...Kf5!
- 1...Sxe5
- 1.Ka1?
- Keys
- 1.d7!
- threat
- 2.Qd6#
- 1...Ke7
- 2.d8Q#
- 1...Re8
- 2.dxe8S#
- 1...Sd4
- 2.Qe5#
- 1...Sg5
- 2.Qe5#
- threat
- 1.d7!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 8
- Sets
- R(e);N_GUARD,P_PINR(G)::QAR1(D),XP(d)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- P(c);N_GUARD::QAR1(D)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- P(c);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- R(e);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- P(c);N_GUARD::QAR1(D)
- R(e);N_GUARD,P_PINR(G)::QAR1(D),XP(d)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- S(a);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- P(c);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- R(e);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- P(c);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- R(e);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- P(c);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- R(e);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- P(c);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- R(e);CHECK
- Try
- R(G);
- Vars
- P(c);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- R(e);CHECK
- Try
- R(G);
- Vars
- P(c);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- R(e);CHECK
- Try
- R(G);
- Vars
- P(c);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- R(e);CHECK
- Try
- R(G);
- Vars
- P(c);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- R(e);CHECK
- Try
- Q(D);CHECK
- Vars
- K(b);P-FLIGHT::R1(G)
- S(a);N_GUARD,P_SPINS(a)::QAB1(D),XS(a)
- Refutation
- S(a);XQ(D)
- Try
- Q(D);CHECK
- Vars
- K(b);OGATE,P-FLIGHT::QAR1(D)
- Refutation
- S(a);XQ(D)
- Try
- P(B);CHECK
- Vars
- S(a);OGATE,XP(B)::QAB1(D),XS(a)
- Refutation
- K(b);P-FLIGHT
- Try
- Actual
- P(E);
- Threat
- QAR2(D)
- Vars
- K(b);S_FLIGHT::P=Q
- R(e);OGATE::PXR(e)=S
- S(a);N_GUARD::QAB1(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).