MESON Chess Problem Database
Problem Display
PID: 698 (B1R4R/1nnr1r1b/8/4QpP1/3p1N2/3Pb3/1K1P1B2/1N1k4 w - - 0 1)
Karlstrom, Alfred Olaf
British Chess Magazine, 1937
#2
11 + 9
| 3098 | FIDE Album (1914-1944) (I) | 1971 |
| 3979 | Systematic Terminology | 1984 |
SOLUTION
- SOUND
- Sets
- 1...Bxd2
- 2.Qe2#
- 1...Bxf2
- 2.Qe2#
- 1...Bxf4
- 2.Qe1#
- 1...Bg6
- 2.Rh1#
- 1...Bg8
- 2.Rh1#
- 1...Sa5
- 2.Bf3#
- 1...Sc5
- 2.Bf3#
- 1...Sd6
- 2.Bf3#
- 1...Sd8
- 2.Bf3#
- 1...Sb5
- 2.Rc1#
- 1...Sd5
- 2.Rc1#
- 1...Sa6
- 2.Rc1#
- 1...Se6
- 2.Rc1#
- 1...Sxa8
- 2.Rc1#
- 1...Se8
- 2.Rc1#
- 1...Bxd2
- Tries
- 1.Bxb7?
- threat
- 2.Bf3#
- 1...Sd5
- 2.Rc1#
- 1...Rd5!
- threat
- 1.Rxc7?
- threat
- 2.Rc1#
- 1...Bxd2
- 2.Qe2#
- 1...Sc5
- 2.Bf3#
- 1...Rxc7!
- threat
- 1.Rxh7?
- threat
- 2.Rh1#
- 1...Bxd2
- 2.Qe2#
- 1...Bxf2
- 2.Qe2#
- 1...Rxh7!
- threat
- 1.Qe4?
- threat
- 2.Qh1#
- 2.Qf3#
- 1...Bxd2
- 2.Qf3#
- 2.Qe2#
- 1...Bxf2
- 2.Qe2#
- 1...Bxf4
- 2.Qf3#
- 2.Qe1#
- 1...fxe4!
- threat
- 1.Qc5?
- threat
- 2.Qc1#
- 2.Qc2#
- 1...Bxd2
- 2.Qc2#
- 1...Bxf2
- 2.Qc1#
- 1...Sxc5
- 2.Bf3#
- 1...Bxf4!
- threat
- 1.Qe6?
- threat
- 2.Qb3#
- 1...Bxf2
- 2.Qe2#
- 1...Bxf4
- 2.Qe1#
- 1...Sxe6
- 2.Rc1#
- 1...Sa5
- 2.Bf3#
- 1...Sc5
- 2.Bf3#
- 1...Sd5
- 2.Rc1#
- 1...Rd5!
- threat
- 1.Bxb7?
- Keys
- 1.Qe8!
- 1...Bxd2
- 2.Qe2#
- 1...Bxf2
- 2.Qe2#
- 1...Bxf4
- 2.Qe1#
- 1...Sxa8
- 2.Rc1#
- 1...Sxe8
- 2.Rc1#
- 1...Rd5
- 2.Qa4#
- 1...Rd6
- 2.Qa4#
- 1...Rde7
- 2.Qa4#
- 1...Rd8
- 2.Qa4#
- 1...Rf6
- 2.Qh5#
- 1...Rfe7
- 2.Qh5#
- 1...Rg7
- 2.Qh5#
- 1...Rf8
- 2.Qh5#
- 1...Bg6
- 2.Rh1#
- 1...Bg8
- 2.Rh1#
- 1...Sa5
- 2.Bf3#
- 1...Sc5
- 2.Bf3#
- 1...Sd6
- 2.Bf3#
- 1...Sd8
- 2.Bf3#
- 1...Sb5
- 2.Rc1#
- 1...Sd5
- 2.Rc1#
- 1...Sa6
- 2.Rc1#
- 1...Se6
- 2.Rc1#
- 1...Bxd2
- 1.Qe8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 0
- Sets
- B(b);OGATE,XP(C)::QAB1(G)
- B(b);OGATE,XB(D)::QAB1(G)
- B(b);OGATE,XS(F)::QAR1(G)
- B(i);OGATE::R(K)
- S(e);OGATE::B(I)
- S(f);OGATE::R1(J)
- S(f);OGATE,XB(I)::R1(J)
- Tries
- Try
- B(I);XS(e)
- Threat
- B(I)
- Vars
- S(f);OGATE::R1(J)
- Refutation
- R(g);
- Try
- R(J);XS(f)
- Threat
- R1(J)
- Vars
- B(b);OGATE,XP(C)::QAB1(G)
- S(e);OGATE::B(I)
- Refutation
- R(g);XR(J)
- Try
- R(K);XB(i)
- Threat
- R(K)
- Vars
- B(b);OGATE,XP(C)::QAB1(G)
- B(b);OGATE,XB(D)::QAB1(G)
- Refutation
- R(h);XR(K)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- B(b);OGATE,XB(D)::QAB1(G)
- Refutation
- P(d);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- B(b);XP(C)::QAB1(G)
- B(b);XB(D)::QAR1(G)
- S(e);OGATE,XQ(G)::B(I)
- Refutation
- B(b);XS(F)
- Try
- Q(G);
- Threat
- QAB(G)
- Vars
- B(b);OGATE,XB(D)::QAB1(G)
- B(b);OGATE,XS(F)::QAR1(G)
- S(f);OGATE,XQ(G)::R1(J)
- S(e);OGATE::B(I)
- S(f);OGATE::R1(J)
- Refutation
- R(g);
- Try
- Actual
- Q(G);
- Vars
- B(b);OGATE,XP(C)::QAB1(G)
- B(b);OGATE,XB(D)::QAB1(G)
- B(b);OGATE,XS(F)::QAR1(G)
- S(f);OGATE,XB(I)::R1(J)
- S(f);OGATE,XQ(G)::R1(J)
- R(g);OGATE::QAB(G)
- R(h);OGATE::QAB(G)
- B(i);OGATE::R(K)
- S(e);OGATE::B(I)
- S(f);OGATE::R1(J)
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).