MESON Chess Problem Database
Problem Display
PID: 271580 (4N2N/6r1/8/4kP2/1Q2P3/8/1K1B4/8 w - - 0 1)
Woodward, LA
The Observer, 1960
(First published on Sun Jul 10 1960)
#2
7 + 2
| 17397 | Ling Notebooks | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Rg1
- 2.Sf7#
- 1...Rg2
- 2.Sf7#
- 1...Rg3
- 2.Sf7#
- 1...Rg4
- 2.Sf7#
- 1...Rg5
- 2.Sf7#
- 1...Rg6
- 2.Sxg6#
- 2.Sf7#
- 1...Ra7
- 2.Sg6#
- 1...Rb7
- 2.Sg6#
- 1...Rc7
- 2.Sg6#
- 1...Rd7
- 2.Sg6#
- 1...Re7
- 2.Sg6#
- 1...Rf7
- 2.Sg6#
- 2.Sxf7#
- 1...Rh7
- 2.Sg6#
- 1...Rg8
- 2.Sf7#
- 1...Rg1
- Tries
- 1.Kb1?
- 1...Rg2
- 2.Sf7#
- 1...Rg3
- 2.Sf7#
- 1...Rg4
- 2.Sf7#
- 1...Rg5
- 2.Sf7#
- 1...Rg6
- 2.Sxg6#
- 2.Sf7#
- 1...Ra7
- 2.Sg6#
- 1...Rb7
- 2.Sg6#
- 1...Rc7
- 2.Sg6#
- 1...Rd7
- 2.Sg6#
- 1...Re7
- 2.Sg6#
- 1...Rf7
- 2.Sg6#
- 2.Sxf7#
- 1...Rh7
- 2.Sg6#
- 1...Rg8
- 2.Sf7#
- 1...Rg1+!
- 1...Rg2
- 1.Ka2?
- 1...Rg1
- 2.Sf7#
- 1...Rg2
- 2.Sf7#
- 1...Rg3
- 2.Sf7#
- 1...Rg4
- 2.Sf7#
- 1...Rg5
- 2.Sf7#
- 1...Rg6
- 2.Sxg6#
- 2.Sf7#
- 1...Rb7
- 2.Sg6#
- 1...Rc7
- 2.Sg6#
- 1...Rd7
- 2.Sg6#
- 1...Re7
- 2.Sg6#
- 1...Rf7
- 2.Sg6#
- 2.Sxf7#
- 1...Rh7
- 2.Sg6#
- 1...Rg8
- 2.Sf7#
- 1...Ra7+!
- 1...Rg1
- 1.Kc2?
- 1...Rg1
- 2.Sf7#
- 1...Rg2
- 2.Sf7#
- 1...Rg3
- 2.Sf7#
- 1...Rg4
- 2.Sf7#
- 1...Rg5
- 2.Sf7#
- 1...Rg6
- 2.Sxg6#
- 2.Sf7#
- 1...Ra7
- 2.Sg6#
- 1...Rb7
- 2.Sg6#
- 1...Rd7
- 2.Sg6#
- 1...Re7
- 2.Sg6#
- 1...Rf7
- 2.Sg6#
- 2.Sxf7#
- 1...Rh7
- 2.Sg6#
- 1...Rg8
- 2.Sf7#
- 1...Rc7+!
- 1...Rg1
- 1.Kb3?
- 1...Rg1
- 2.Sf7#
- 1...Rg2
- 2.Sf7#
- 1...Rg4
- 2.Sf7#
- 1...Rg5
- 2.Sf7#
- 1...Rg6
- 2.Sxg6#
- 2.Sf7#
- 1...Ra7
- 2.Sg6#
- 1...Rb7
- 2.Sg6#
- 1...Rc7
- 2.Sg6#
- 1...Rd7
- 2.Sg6#
- 1...Re7
- 2.Sg6#
- 1...Rf7
- 2.Sg6#
- 2.Sxf7#
- 1...Rh7
- 2.Sg6#
- 1...Rg8
- 2.Sf7#
- 1...Rg3+!
- 1...Rg1
- 1.Bc1?
- 1...Rg1
- 2.Sf7#
- 1...Rg3
- 2.Sf7#
- 1...Rg4
- 2.Sf7#
- 1...Rg5
- 2.Sf7#
- 1...Rg6
- 2.Sxg6#
- 2.Sf7#
- 1...Ra7
- 2.Sg6#
- 1...Rb7
- 2.Sg6#
- 1...Rc7
- 2.Sg6#
- 1...Rd7
- 2.Sg6#
- 1...Re7
- 2.Sg6#
- 1...Rf7
- 2.Sg6#
- 2.Sxf7#
- 1...Rh7
- 2.Sg6#
- 1...Rg8
- 2.Sf7#
- 1...Rg2+!
- 1...Rg1
- 1.Be3?
- threat
- 2.Qd4#
- 1...Rb7
- 2.Sg6#
- 1...Rd7
- 2.Sg6#
- 1...Rg2+!
- threat
- 1.Bg5?
- 1...Rg6
- 2.Sxg6#
- 2.Sf7#
- 1...Ra7
- 2.Sg6#
- 1...Rb7
- 2.Sg6#
- 1...Rc7
- 2.Sg6#
- 1...Rd7
- 2.Sg6#
- 1...Re7
- 2.Sg6#
- 1...Rf7
- 2.Sg6#
- 2.Sxf7#
- 1...Rh7
- 2.Sg6#
- 1...Rg8
- 2.Sf7#
- 1...Rxg5!
- 1...Rg6
- 1.Qa5+?
- 1...Kd4
- 2.Qd5#
- 1...Kxe4!
- 1...Kd4
- 1.Qa4?
- 1...Rg1
- 2.Sf7#
- 1...Rg2
- 2.Sf7#
- 1...Rg3
- 2.Sf7#
- 1...Rg4
- 2.Sf7#
- 1...Rg5
- 2.Sf7#
- 1...Rg6
- 2.Sxg6#
- 2.Sf7#
- 1...Ra7
- 2.Sg6#
- 1...Rc7
- 2.Sg6#
- 1...Rd7
- 2.Sg6#
- 1...Re7
- 2.Sg6#
- 1...Rf7
- 2.Sg6#
- 2.Sxf7#
- 1...Rh7
- 2.Sg6#
- 1...Rg8
- 2.Sf7#
- 1...Rb7+!
- 1...Rg1
- 1.Qc4?
- threat
- 2.Qd5#
- 1...Rd7
- 2.Sg6#
- 1...Rb7+!
- threat
- 1.Qb5+?
- 1...Kd4
- 2.Qd5#
- 1...Kxe4!
- 1...Kd4
- 1.Kb1?
- Keys
- 1.Sf6!
- 1...Kxf6
- 2.Qd6#
- 1...Rg1
- 2.Sd7#
- 1...Rg2
- 2.Sd7#
- 1...Rg3
- 2.Sd7#
- 1...Rg4
- 2.Sxg4#
- 2.Sd7#
- 1...Rg5
- 2.Sd7#
- 1...Rg6
- 2.Sd7#
- 1...Ra7
- 2.Sg4#
- 1...Rb7
- 2.Sg4#
- 1...Rc7
- 2.Sg4#
- 1...Rd7
- 2.Sg4#
- 2.Sxd7#
- 1...Re7
- 2.Sg4#
- 1...Rf7
- 2.Sg4#
- 1...Rh7
- 2.Sg4#
- 1...Rg8
- 2.Sd7#
- 1...Kxf6
- 1.Sf6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 10
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- R(b);N_GUARD::S(G)
- R(b);N_GUARD,P_PINB(B)::S(G)
- R(b);N_GUARD,P_PINQ(C)::S(G)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- R(b);N_GUARD::S(G)
- R(b);N_GUARD,P_PINQ(C)::S(G)
- Refutation
- R(b);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- R(b);N_GUARD::S(G)
- R(b);N_GUARD,P_PINB(B)::S(G)
- Refutation
- R(b);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- R(b);N_GUARD::S(G)
- R(b);N_GUARD,P_PINB(B)::S(G)
- Refutation
- R(b);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- R(b);N_GUARD::S(G)
- R(b);N_GUARD,P_PINQ(C)::S(G)
- Refutation
- R(b);CHECK
- Try
- B(B);
- Vars
- R(b);N_GUARD::S(G)
- R(b);N_GUARD,P_PINQ(C)::S(G)
- Refutation
- R(b);CHECK
- Try
- B(B);
- Threat
- QAB1(C)
- Vars
- R(b);N_GUARD,P_PINQ(C)::S(G)
- R(b);N_GUARD::S(G)
- Refutation
- R(b);CHECK
- Try
- B(B);
- Vars
- R(b);N_GUARD::S(G)
- R(b);N_GUARD,P_PINQ(C)::S(G)
- Refutation
- R(b);XB(B)
- Try
- Q(C);CHECK
- Vars
- K(a);S_FLIGHT::QAR1(C)
- Refutation
- K(a);P-FLIGHT,XP(D)
- Try
- Q(C);
- Vars
- R(b);N_GUARD::S(G)
- R(b);N_GUARD,P_PINB(B)::S(G)
- Refutation
- R(b);CHECK
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- R(b);N_GUARD::S(G)
- Refutation
- R(b);CHECK
- Try
- Q(C);CHECK
- Vars
- K(a);S_FLIGHT::QAR1(C)
- Refutation
- K(a);P-FLIGHT,XP(D)
- Try
- Actual
- S(F);
- Vars
- K(a);N_GUARD,S_FLIGHT,XS(F)::QAR2(C)
- R(b);N_GUARD::S(F)
- R(b);N_GUARD,P_PINB(B)::S(F)
- R(b);N_GUARD,P_PINQ(C)::S(F)
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).