MESON Chess Problem Database
Problem Display
PID: 62671 (2bN4/8/r1p1R3/q1k4K/p7/P1p2N2/B7/BQ3R2 w - - 0 1)
Alexander, Frederick Forrest Lawrie
Chess, 1944
#2
9 + 7
| 15148 | Sadier Collection | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Qb4
- 2.Qxb4#
- 1...Qb6
- 2.Qf5#
- 1...Qc7
- 2.Qb4#
- 1...Qxd8
- 2.Qb4#
- 1...Rb6
- 2.Qf5#
- 1...Ra7
- 2.Rxc6#
- 1...Ra8
- 2.Rxc6#
- 1...Bxe6
- 2.Sb7#
- 1...Bb7
- 2.Sxb7#
- 1...Bd7
- 2.Sb7#
- 1...c2
- 2.Bd4#
- 1...Qb4
- Tries
- 1.Kg6?
- 1...Qxd8
- 2.Qb4#
- 1...Bxe6
- 2.Sb7#
- 1...Qb4
- 2.Qxb4#
- 1...Qb6
- 2.Qf5#
- 1...Qc7
- 2.Qb4#
- 1...Rb6
- 2.Qf5#
- 1...Ra7
- 2.Rxc6#
- 1...Ra8
- 2.Rxc6#
- 1...Bb7
- 2.Sxb7#
- 1...Bd7
- 2.Sb7#
- 1...c2
- 2.Bd4#
- 1...Qb5!
- 1...Qxd8
- 1.Kh6?
- 1...Qxd8
- 2.Qb4#
- 1...Bxe6
- 2.Sb7#
- 1...Qb4
- 2.Qxb4#
- 1...Qb6
- 2.Qf5#
- 1...Qc7
- 2.Qb4#
- 1...Rb6
- 2.Qf5#
- 1...Ra7
- 2.Rxc6#
- 1...Ra8
- 2.Rxc6#
- 1...Bb7
- 2.Sxb7#
- 1...Bd7
- 2.Sb7#
- 1...c2
- 2.Bd4#
- 1...Qb5!
- 1...Qxd8
- 1.Bxc3?
- threat
- 2.Bd4#
- 1...Qxd8
- 2.Qb4#
- 1...Bxe6
- 2.Sb7#
- 1...Qb4
- 2.Qxb4#
- 1...Qxc3!
- threat
- 1.Rc1?
- 1...Qxd8
- 2.Rxc3#
- 2.Qb4#
- 1...Bxe6
- 2.Sb7#
- 1...Qb4
- 2.Qxb4#
- 1...Qb6
- 2.Rxc3#
- 2.Qf5#
- 1...Qc7
- 2.Rxc3#
- 2.Qb4#
- 1...Rb6
- 2.Qf5#
- 1...Ra7
- 2.Rxc6#
- 1...Ra8
- 2.Rxc6#
- 1...Bb7
- 2.Sxb7#
- 1...Bd7
- 2.Sb7#
- 1...c2
- 2.Bd4#
- 1...Qb5!
- 1...Qxd8
- 1.Rd1?
- threat
- 2.Re5#
- 1...Qxd8
- 2.Qb4#
- 1...Bxe6
- 2.Sxe6#
- 2.Sb7#
- 1...Qb4
- 2.Qxb4#
- 1...Qc7
- 2.Qb4#
- 1...Qb5!
- threat
- 1.Rfe1?
- threat
- 2.R1e5#
- 1...Qxd8
- 2.Qb4#
- 1...Bxe6
- 2.Sb7#
- 1...Qb4
- 2.Qxb4#
- 1...Qc7
- 2.Qb4#
- 1...Qb5!
- threat
- 1.Rg1?
- threat
- 2.Rg5#
- 1...Qxd8
- 2.Qb4#
- 1...Bxe6
- 2.Sb7#
- 1...Qb4
- 2.Qxb4#
- 1...Qc7
- 2.Qb4#
- 1...Qb5!
- threat
- 1.Rf2?
- 1...Qxd8
- 2.Qb4#
- 1...Bxe6
- 2.Sb7#
- 1...Qb4
- 2.Qxb4#
- 1...Qb6
- 2.Qf5#
- 1...Qc7
- 2.Qb4#
- 1...Rb6
- 2.Qf5#
- 1...Ra7
- 2.Rxc6#
- 1...Ra8
- 2.Rxc6#
- 1...Bb7
- 2.Sxb7#
- 1...Bd7
- 2.Sb7#
- 1...c2
- 2.Bd4#
- 1...Qb5!
- 1...Qxd8
- 1.Qb8?
- threat
- 2.Re5#
- 1...Qxd8
- 2.Qb4#
- 1...Bxe6
- 2.Sxe6#
- 1...Qc7
- 2.Qb4#
- 1...Bb7!
- threat
- 1.Kg6?
- Keys
- 1.Rh1!
- 1...Qxd8
- 2.Qb4#
- 1...Bxe6
- 2.Sb7#
- 1...Qb4
- 2.Qxb4#
- 1...Qb5
- 2.Qg1#
- 1...Qb6
- 2.Qf5#
- 1...Qc7
- 2.Qb4#
- 1...Rb6
- 2.Qf5#
- 1...Ra7
- 2.Rxc6#
- 1...Ra8
- 2.Rxc6#
- 1...Bb7
- 2.Sxb7#
- 1...Bd7
- 2.Sb7#
- 1...c2
- 2.Bd4#
- 1...Qxd8
- 1.Rh1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(c);N_GUARD::QAB1(B),XQ(c)
- Q(c);SBLOCK::QAR(B)
- Q(c);N_GUARD::QAB1(B)
- Q(c);N_GUARD,XS(I)::QAB1(B)
- R(e);SBLOCK::QAR(B)
- R(e);N_GUARD::R1(H),XP(f)
- B(g);N_GUARD,XR(H)::S(I)
- B(g);N_GUARD::S(I),XB(g)
- B(g);N_GUARD::S(I)
- P(a);OGATE::B(A)
- Tries
- Try
- K(G);S_FLIGHT
- Vars
- Q(c);N_GUARD,XS(I)::QAB1(B)
- B(g);N_GUARD,XR(H)::S(I)
- Q(c);N_GUARD::QAB1(B),XQ(c)
- Q(c);SBLOCK::QAR(B)
- Q(c);N_GUARD::QAB1(B)
- R(e);SBLOCK::QAR(B)
- R(e);N_GUARD::R1(H),XP(f)
- B(g);N_GUARD::S(I),XB(g)
- B(g);N_GUARD::S(I)
- P(a);OGATE::B(A)
- Refutation
- Q(c);
- Try
- K(G);P-FLIGHT
- Vars
- Q(c);N_GUARD,XS(I)::QAB1(B)
- B(g);N_GUARD,XR(H)::S(I)
- Q(c);N_GUARD::QAB1(B),XQ(c)
- Q(c);SBLOCK::QAR(B)
- Q(c);N_GUARD::QAB1(B)
- R(e);SBLOCK::QAR(B)
- R(e);N_GUARD::R1(H),XP(f)
- B(g);N_GUARD::S(I),XB(g)
- B(g);N_GUARD::S(I)
- P(a);OGATE::B(A)
- Refutation
- Q(c);
- Try
- B(A);XP(a)
- Threat
- B(A)
- Vars
- Q(c);N_GUARD,XS(I)::QAB1(B)
- B(g);N_GUARD,XR(H)::S(I)
- Q(c);N_GUARD::QAB1(B),XQ(c)
- Refutation
- Q(c);XB(A)
- Try
- R(C);P_PINP(a)
- Vars
- B(g);N_GUARD,XR(H)::S(I)
- Q(c);N_GUARD::QAB1(B),XQ(c)
- R(e);SBLOCK::QAR(B)
- R(e);N_GUARD::R1(H),XP(f)
- B(g);N_GUARD::S(I),XB(g)
- B(g);N_GUARD::S(I)
- P(a);OGATE::B(A)
- Refutation
- Q(c);
- Try
- R(C);
- Threat
- R(H)
- Vars
- Q(c);N_GUARD,XS(I)::QAB1(B)
- Q(c);N_GUARD::QAB1(B),XQ(c)
- Q(c);N_GUARD::QAB1(B)
- Refutation
- Q(c);
- Try
- R(C);
- Threat
- R(C)
- Vars
- Q(c);N_GUARD,XS(I)::QAB1(B)
- B(g);N_GUARD,XR(H)::S(I)
- Q(c);N_GUARD::QAB1(B),XQ(c)
- Q(c);N_GUARD::QAB1(B)
- Refutation
- Q(c);
- Try
- R(C);
- Threat
- R(C)
- Vars
- Q(c);N_GUARD,XS(I)::QAB1(B)
- B(g);N_GUARD,XR(H)::S(I)
- Q(c);N_GUARD::QAB1(B),XQ(c)
- Q(c);N_GUARD::QAB1(B)
- Refutation
- Q(c);
- Try
- R(C);
- Vars
- Q(c);N_GUARD,XS(I)::QAB1(B)
- B(g);N_GUARD,XR(H)::S(I)
- Q(c);N_GUARD::QAB1(B),XQ(c)
- Q(c);SBLOCK::QAR(B)
- Q(c);N_GUARD::QAB1(B)
- R(e);SBLOCK::QAR(B)
- R(e);N_GUARD::R1(H),XP(f)
- B(g);N_GUARD::S(I),XB(g)
- B(g);N_GUARD::S(I)
- P(a);OGATE::B(A)
- Refutation
- Q(c);
- Try
- Q(B);
- Threat
- R(H)
- Vars
- Q(c);N_GUARD,XS(I)::QAB1(B)
- B(g);XR(H)::S(I),XB(g)
- Q(c);N_GUARD::QAB1(B)
- Refutation
- B(g);
- Try
- Actual
- R(C);
- Vars
- Q(c);N_GUARD,XS(I)::QAB1(B)
- B(g);N_GUARD,XR(H)::S(I)
- Q(c);N_GUARD::QAB1(B),XQ(c)
- Q(c);SBLOCK::QAB(B)
- Q(c);SBLOCK::QAR(B)
- Q(c);N_GUARD::QAB1(B)
- R(e);SBLOCK::QAR(B)
- R(e);N_GUARD::R1(H),XP(f)
- B(g);N_GUARD::S(I),XB(g)
- B(g);N_GUARD::S(I)
- P(a);OGATE::B(A)
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).