MESON Chess Problem Database
Problem Display
PID: 540 (1nN5/p6q/b1kPP3/5pR1/P1pR4/B1P5/3KP3/1Q6 w - - 0 1)
Mansfield, Comins
2nd HM., The Observer, 1961
#2
11 + 7
| 3550 | Complete Mansfield/II | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Qg6
- 2.Sxa7#
- 2.Se7#
- 2.Qh1#
- 1...Qg8
- 2.Sxa7#
- 2.Se7#
- 2.Qh1#
- 1...Qh1
- 2.Sxa7#
- 2.Se7#
- 2.Qxh1#
- 1...Qh2
- 2.Sxa7#
- 2.Se7#
- 1...Qh3
- 2.Sxa7#
- 2.Se7#
- 1...Qh4
- 2.Sxa7#
- 2.Se7#
- 1...Qh5
- 2.Sxa7#
- 2.Se7#
- 1...Qh6
- 2.Sxa7#
- 2.Se7#
- 1...Qb7
- 2.Qh1#
- 1...Qc7
- 2.Qh1#
- 1...Qd7
- 2.Qh1#
- 1...Qe7
- 2.Sxe7#
- 2.Qh1#
- 1...Qf7
- 2.Qh1#
- 1...Qg7
- 2.Qh1#
- 1...Qh8
- 2.Sxa7#
- 2.Se7#
- 1...Bb5
- 2.Qxb5#
- 1...Bb7
- 2.Sxa7#
- 2.Qb5#
- 1...Bxc8
- 2.Qb5#
- 1...Sd7
- 2.Sxa7#
- 1...f4
- 2.Rc5#
- 1...Qg6
- Tries
- 1.Kc2?
- 1...Bxc8
- 2.Qb5#
- 1...Bb5
- 2.Qxb5#
- 1...Qb7
- 2.Qh1#
- 1...Qg6
- 2.Sxa7#
- 2.Se7#
- 2.Qh1#
- 1...Qg8
- 2.Sxa7#
- 2.Se7#
- 2.Qh1#
- 1...Qh1
- 2.Sxa7#
- 2.Se7#
- 2.Qxh1#
- 1...Qh2
- 2.Sxa7#
- 2.Se7#
- 1...Qh3
- 2.Sxa7#
- 2.Se7#
- 1...Qh4
- 2.Sxa7#
- 2.Se7#
- 1...Qh5
- 2.Sxa7#
- 2.Se7#
- 1...Qh6
- 2.Sxa7#
- 2.Se7#
- 1...Qc7
- 2.Qh1#
- 1...Qd7
- 2.Qh1#
- 1...Qe7
- 2.Sxe7#
- 2.Qh1#
- 1...Qf7
- 2.Qh1#
- 1...Qg7
- 2.Qh1#
- 1...Qh8
- 2.Sxa7#
- 2.Se7#
- 1...Bb7
- 2.Sxa7#
- 2.Qb5#
- 1...Sd7
- 2.Sxa7#
- 1...f4+!
- 1...Bxc8
- 1.Rd3?
- 1...Bxc8
- 2.Qb5#
- 1...Bb5
- 2.Qxb5#
- 1...Qb7
- 2.Qh1#
- 1...Qg6
- 2.Sxa7#
- 2.Se7#
- 2.Qh1#
- 1...Qg8
- 2.Sxa7#
- 2.Se7#
- 2.Qh1#
- 1...Qh1
- 2.Sxa7#
- 2.Se7#
- 2.Qxh1#
- 1...Qh2
- 2.Sxa7#
- 2.Se7#
- 1...Qh3
- 2.Sxa7#
- 2.Se7#
- 1...Qh4
- 2.Sxa7#
- 2.Se7#
- 1...Qh5
- 2.Sxa7#
- 2.Se7#
- 1...Qh6
- 2.Sxa7#
- 2.Se7#
- 1...Qc7
- 2.Qh1#
- 1...Qd7
- 2.Qh1#
- 1...Qe7
- 2.Sxe7#
- 2.Qh1#
- 1...Qf7
- 2.Qh1#
- 1...Qg7
- 2.Qh1#
- 1...Qh8
- 2.Sxa7#
- 2.Se7#
- 1...Bb7
- 2.Sxa7#
- 2.Qb5#
- 1...Sd7
- 2.Sxa7#
- 1...f4
- 2.Rc5#
- 1...cxd3!
- 1...Bxc8
- 1.Rxc4+?
- 1...Kd5
- 2.Qe4#
- 1...Bxc4!
- 1...Kd5
- 1.Rf4?
- 1...Kd5
- 2.Qe4#
- 1...Bxc8
- 2.Qb5#
- 1...Bb5
- 2.Qxb5#
- 1...Qb7
- 2.Qh1#
- 1...Qg6
- 2.Se7#
- 2.Qh1#
- 1...Qg8
- 2.Se7#
- 2.Qh1#
- 1...Qh1
- 2.Se7#
- 2.Qxh1#
- 1...Qh2
- 2.Se7#
- 1...Qh3
- 2.Se7#
- 1...Qh4
- 2.Se7#
- 1...Qh5
- 2.Se7#
- 1...Qh6
- 2.Se7#
- 1...Qc7
- 2.Qh1#
- 1...Qd7
- 2.Qh1#
- 1...Qe7
- 2.Sxe7#
- 2.Qh1#
- 1...Qf7
- 2.Qh1#
- 1...Qg7
- 2.Qh1#
- 1...Qh8
- 2.Se7#
- 1...Bb7
- 2.Qb5#
- 1...Sd7!
- 1...Kd5
- 1.Rdg4?
- 1...Kd5
- 2.Qe4#
- 1...Bxc8
- 2.Qb5#
- 1...fxg4
- 2.Rc5#
- 1...Bb5
- 2.Qxb5#
- 1...Qb7
- 2.Qh1#
- 1...Qg6
- 2.Se7#
- 2.Qh1#
- 1...Qg8
- 2.Se7#
- 2.Qh1#
- 1...Qh1
- 2.Se7#
- 2.Qxh1#
- 1...Qh2
- 2.Se7#
- 1...Qh3
- 2.Se7#
- 1...Qh4
- 2.Se7#
- 1...Qh5
- 2.Se7#
- 1...Qh6
- 2.Se7#
- 1...Qc7
- 2.Qh1#
- 1...Qd7
- 2.Qh1#
- 1...Qe7
- 2.Sxe7#
- 2.Qh1#
- 1...Qf7
- 2.Qh1#
- 1...Qg7
- 2.Qh1#
- 1...Qh8
- 2.Se7#
- 1...Bb7
- 2.Qb5#
- 1...f4
- 2.Rc5#
- 1...Sd7!
- 1...Kd5
- 1.Rxf5?
- threat
- 2.Rc5#
- 2.Qe4#
- 1...Qxf5
- 2.Sxa7#
- 2.Se7#
- 1...Bxc8
- 2.Rxc4#
- 2.Rc5#
- 2.Qb5#
- 1...Bb5
- 2.Qe4#
- 2.Qxb5#
- 1...Qh1
- 2.Sxa7#
- 2.Se7#
- 2.Rc5#
- 2.Qxh1#
- 1...Qh4
- 2.Sxa7#
- 2.Rc5#
- 1...Qh5
- 2.Sxa7#
- 2.Se7#
- 2.Qe4#
- 1...Sd7
- 2.Sxa7#
- 2.Qe4#
- 1...Qh6+!
- threat
- 1.Rg6?
- 1...Qxg6
- 2.Sxa7#
- 2.Se7#
- 1...Bxc8
- 2.Qb5#
- 1...Bb5
- 2.Qxb5#
- 1...Qb7
- 2.Qh1#
- 1...Qg8
- 2.Sxa7#
- 2.Se7#
- 2.Qh1#
- 1...Qh1
- 2.Sxa7#
- 2.Se7#
- 2.Qxh1#
- 1...Qh2
- 2.Sxa7#
- 2.Se7#
- 1...Qh3
- 2.Sxa7#
- 2.Se7#
- 1...Qh4
- 2.Sxa7#
- 1...Qh5
- 2.Sxa7#
- 2.Se7#
- 1...Qc7
- 2.Qh1#
- 1...Qd7
- 2.Qh1#
- 1...Qe7
- 2.Sxe7#
- 2.Qh1#
- 1...Qf7
- 2.Qh1#
- 1...Qg7
- 2.Qh1#
- 1...Qh8
- 2.Sxa7#
- 2.Se7#
- 1...Bb7
- 2.Sxa7#
- 2.Qb5#
- 1...Sd7
- 2.Sxa7#
- 1...f4
- 2.Qe4#
- 1...Qh6+!
- 1...Qxg6
- 1.e3?
- 1...Bxc8
- 2.Qb5#
- 1...Bb5
- 2.Qxb5#
- 1...Qb7
- 2.Qh1#
- 1...Qg6
- 2.Sxa7#
- 2.Se7#
- 2.Qh1#
- 1...Qg8
- 2.Sxa7#
- 2.Se7#
- 2.Qh1#
- 1...Qh1
- 2.Sxa7#
- 2.Se7#
- 2.Qxh1#
- 1...Qh3
- 2.Sxa7#
- 2.Se7#
- 1...Qh4
- 2.Sxa7#
- 2.Se7#
- 1...Qh5
- 2.Sxa7#
- 2.Se7#
- 1...Qh6
- 2.Sxa7#
- 2.Se7#
- 1...Qc7
- 2.Qh1#
- 1...Qd7
- 2.Qh1#
- 1...Qe7
- 2.Sxe7#
- 2.Qh1#
- 1...Qf7
- 2.Qh1#
- 1...Qg7
- 2.Qh1#
- 1...Qh8
- 2.Sxa7#
- 2.Se7#
- 1...Bb7
- 2.Sxa7#
- 2.Qb5#
- 1...Sd7
- 2.Sxa7#
- 1...f4
- 2.Rc5#
- 1...Qh2+!
- 1...Bxc8
- 1.Kc2?
- Keys
- 1.Rh4!
- threat
- 2.Qh1#
- 1...Kd5
- 2.Qe4#
- 1...Qxh4
- 2.Se7#
- 1...Bxc8
- 2.Qb5#
- 1...Qh5
- 2.Se7#
- 1...f4
- 2.Rc5#
- threat
- 1.Rh4!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- Q(f);N_GUARD,SBLOCK::QAB(A)
- Q(f);N_GUARD::QAB(A)
- B(c);N_GUARD::QAB1(A),XB(c)
- B(c);N_GUARD,XS(K)::QAB1(A)
- S(g);S_CUTQ(f)::S(K),XP(e)
- P(b);OGATE::R1(H)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- B(c);N_GUARD,XS(K)::QAB1(A)
- B(c);N_GUARD::QAB1(A),XB(c)
- Q(f);N_GUARD,SBLOCK::QAB(A)
- Q(f);N_GUARD::QAB(A)
- S(g);S_CUTQ(f)::S(K),XP(e)
- Refutation
- P(b);CHECK
- Try
- R(G);
- Vars
- B(c);N_GUARD,XS(K)::QAB1(A)
- B(c);N_GUARD::QAB1(A),XB(c)
- Q(f);N_GUARD,SBLOCK::QAB(A)
- Q(f);N_GUARD::QAB(A)
- S(g);S_CUTQ(f)::S(K),XP(e)
- P(b);OGATE::R1(H)
- Refutation
- P(a);XR(G)
- Try
- R(G);CHECK,XP(a)
- Vars
- K(d);P_SPINP(b),S_FLIGHT::QAB1(A)
- Refutation
- B(c);XR(G)
- Try
- R(G);
- Vars
- K(d);P_SPINP(b),S_FLIGHT::QAB1(A)
- B(c);N_GUARD,XS(K)::QAB1(A)
- B(c);N_GUARD::QAB1(A),XB(c)
- Q(f);N_GUARD,SBLOCK::QAB(A)
- Q(f);N_GUARD,P_PINP(C)::S(K)
- Q(f);N_GUARD::S(K)
- Q(f);N_GUARD::QAB(A)
- Q(f);N_GUARD,P_PINP(I)::QAB(A)
- B(c);N_GUARD::QAB1(A)
- Refutation
- S(g);
- Try
- R(G);
- Vars
- K(d);P_SPINP(b),S_FLIGHT::QAB1(A)
- B(c);N_GUARD,XS(K)::QAB1(A)
- P(b);OGATE,XR(G)::R1(H)
- B(c);N_GUARD::QAB1(A),XB(c)
- Q(f);N_GUARD,SBLOCK::QAB(A)
- Q(f);N_GUARD,P_PINP(C)::S(K)
- Q(f);N_GUARD::S(K)
- Q(f);N_GUARD,P_PINR(H)::S(K)
- Q(f);N_GUARD::QAB(A)
- Q(f);N_GUARD,P_PINP(I)::QAB(A)
- B(c);N_GUARD::QAB1(A)
- P(b);OGATE::R1(H)
- Refutation
- S(g);
- Try
- R(H);XP(b)
- Threat
- DUALS(2)
- Refutation
- Q(f);CHECK
- Try
- R(H);
- Vars
- B(c);N_GUARD,XS(K)::QAB1(A)
- B(c);N_GUARD::QAB1(A),XB(c)
- Q(f);N_GUARD,SBLOCK::QAB(A)
- Q(f);N_GUARD::S(K),XP(e)
- Q(f);N_GUARD::QAB(A)
- S(g);S_CUTQ(f)::S(K),XP(e)
- P(b);N_GUARD::QAB(A)
- Refutation
- Q(f);CHECK
- Try
- P(C);
- Vars
- B(c);N_GUARD,XS(K)::QAB1(A)
- B(c);N_GUARD::QAB1(A),XB(c)
- Q(f);N_GUARD,SBLOCK::QAB(A)
- Q(f);N_GUARD::QAB(A)
- S(g);S_CUTQ(f)::S(K),XP(e)
- P(b);OGATE::R1(H)
- Refutation
- Q(f);CHECK
- Try
- Actual
- R(G);
- Threat
- QAB(A)
- Vars
- K(d);P_SPINP(b),S_FLIGHT::QAB1(A)
- Q(f);N_GUARD,XR(G)::S(K)
- B(c);N_GUARD,XS(K)::QAB1(A)
- Q(f);N_GUARD::S(K)
- P(b);OGATE::R1(H)
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).