MESON Chess Problem Database
Problem Display
PID: 16466 (bb1rR2B/2np1N2/4PN1K/1r3k1p/5n2/4Q1P1/B1Rq4/8 w - - 0 1)
Ekstrom, Sven Johan Adrian
Knoppel, Jan Heribert
1st Prize, Vart Hem, 1940/IV
#2
10 + 10
| 3680 | Jan Knoppel Udvalgte Skakproblemer | 1955 |
| 3174 | The Two-move Chess Problem Tradition and Development | 1966 |
| 3098 | FIDE Album (1914-1944) (I) | 1971 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Sd6#
- 1...Qe1
- 2.Sd6#
- 2.Qxf4#
- 1...Qc3
- 2.Sd6#
- 2.Qxf4#
- 1...Qa5
- 2.Sd6#
- 2.Qxf4#
- 1...Qd1
- 2.Qxf4#
- 1...Qxc2
- 2.Sd6#
- 2.Qxf4#
- 1...Qe2
- 2.Sd6#
- 2.Qxf4#
- 1...Qf2
- 2.Sd6#
- 1...Qg2
- 2.Sd6#
- 2.Qxf4#
- 1...Qh2
- 2.Sd6#
- 2.Qxf4#
- 1...Qd3
- 2.Qxf4#
- 1...Qd5
- 2.Qxf4#
- 1...Qd6
- 2.Sxd6#
- 1...Rb1
- 2.Qe5#
- 1...Rb2
- 2.Qe5#
- 1...Rb3
- 2.Qe5#
- 1...Rb4
- 2.Qe5#
- 1...Rd5
- 2.Qe4#
- 1...Re5
- 2.Qxe5#
- 1...Rb6
- 2.Qe5#
- 1...Rb7
- 2.Qe4#
- 2.Qe5#
- 1...Be4
- 2.Qxe4#
- 1...Bd5
- 2.Sd6#
- 2.Qe5#
- 1...Sd3
- 2.Sd6#
- 1...Sfd5
- 2.Sd6#
- 1...Scd5
- 2.Qe4#
- 1...h4
- 2.g4#
- 1...d5
- 2.Qe5#
- 1...Qc1
- Tries
- 1.Bd5?
- threat
- 2.Sd6#
- 2.Qe4#
- 2.Qe5#
- 1...Qxc2
- 2.Sd6#
- 2.Qxf4#
- 2.Qe5#
- 1...Qxd5
- 2.Qxf4#
- 1...Rxd5
- 2.Qe4#
- 1...Bxd5
- 2.Sd6#
- 2.Qe5#
- 1...Sfxd5
- 2.Sd6#
- 1...Sfxe6
- 2.Sd6#
- 1...Scxd5
- 2.Qe4#
- 1...Scxe6
- 2.Qe4#
- 1...Sxe8
- 2.Qe4#
- 1...dxe6
- 2.Qe4#
- 2.Qe5#
- 1...Qe1
- 2.Sd6#
- 2.Qxf4#
- 1...Qc3
- 2.Sd6#
- 2.Qxf4#
- 2.Qe4#
- 1...Qb4
- 2.Qe5#
- 1...Qe2
- 2.Sd6#
- 2.Qxf4#
- 1...Qg2
- 2.Sd6#
- 2.Qxf4#
- 2.Qe5#
- 1...Qd3
- 2.Sd6#
- 2.Qxf4#
- 2.Qe5#
- 1...Qd4
- 2.Sd6#
- 1...Rb4
- 2.Sd6#
- 2.Qe5#
- 1...Rb6
- 2.Qe4#
- 2.Qe5#
- 1...Se2
- 2.Sd6#
- 1...Sg2
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 1...Sh3
- 2.Sd6#
- 1...Sg6
- 2.Sd6#
- 1...Sa6
- 2.Qe4#
- 1...d6
- 2.Qe4#
- 1...Qxe3!
- threat
- 1.Rc5+?
- 1...Qd5
- 2.Sd6#
- 2.Qxf4#
- 2.Qe4#
- 1...Bd5
- 2.Sd6#
- 2.Qe4#
- 2.Qe5#
- 1...Sfd5
- 2.Sd6#
- 1...Scd5
- 2.Qe4#
- 1...d5
- 2.Qe4#
- 2.Qe5#
- 1...Rxc5!
- 1...Qd5
- 1.Bd5?
- Keys
- 1.Bb1!
- threat
- 2.Rc5#
- 1...Qxc2
- 2.Sd6#
- 2.Qxf4#
- 1...Rxb1
- 2.Qe5#
- 1...Qc3
- 2.Sd6#
- 2.Qxf4#
- 1...Qd3
- 2.Qxf4#
- 1...Qd5
- 2.Qxf4#
- 1...Rc5
- 2.Rxc5#
- 1...Rd5
- 2.Qe4#
- 1...Re5
- 2.Qxe5#
- 1...Be4
- 2.Qxe4#
- 1...Bd5
- 2.Sd6#
- 2.Qe5#
- 1...Sd3
- 2.Sd6#
- 1...Sfd5
- 2.Sd6#
- 1...Scd5
- 2.Qe4#
- 1...d5
- 2.Qe5#
- threat
- 1.Bb1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- Q(a);N_GUARD::S(H)
- Q(a);N_GUARD::QAR1(C),XS(b)
- Q(a);N_GUARD::S(H),XQ(a)
- R(c);N_GUARD::QAR1(C)
- R(c);S_CUTB(h)::QAB1(C)
- R(c);N_GUARD::QAR1(C),XR(c)
- B(h);N_GUARD::QAB1(C),XB(h)
- S(b);P_PINQ(C),S_CUTQ(a)::S(H)
- S(f);S_CUTB(h)::QAB1(C)
- P(e);N_GUARD::P(D)
- P(g);S_CUTR(c)::QAR1(C)
- Tries
- Try
- B(A);
- Threat
- DUALS(3)
- Vars
- Q(a);N_GUARD,XB(A)::QAR1(C),XS(b)
- R(c);XB(A)::QAB1(C)
- S(b);P_PINQ(C),XB(A)::S(H)
- S(b);P_PINQ(C),XP(E)::S(H)
- S(f);XB(A)::QAB1(C)
- S(f);XP(E)::QAB1(C)
- S(f);XR(I)::QAB1(C)
- Q(a);::QAR1(C)
- Q(a);::S(H)
- S(b);P_PINQ(C)::S(H)
- S(f);::QAB1(C)
- P(g);::QAB1(C)
- Refutation
- Q(a);XQ(C)
- Try
- R(B);CHECK
- Vars
- S(b);P_PINQ(C),P_SPINS(b)::S(H)
- S(f);P_SPINS(f)::QAB1(C)
- Refutation
- R(c);XR(B)
- Try
- Actual
- B(A);
- Threat
- B(A)+R(B),DCHECK
- Vars
- R(c);N_GUARD,XB(A)::QAR1(C)
- Q(a);N_GUARD::QAR1(C),XS(b)
- R(c);::B(A)+R(B),DCHECK,XR(c)
- R(c);S_CUTB(h)::QAB1(C)
- R(c);N_GUARD::QAR1(C),XR(c)
- B(h);N_GUARD::QAB1(C),XB(h)
- S(b);P_PINQ(C),S_CUTQ(a)::S(H)
- S(f);S_CUTB(h)::QAB1(C)
- P(g);S_CUTR(c)::QAR1(C)
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).