MESON Chess Problem Database
Problem Display
PID: 249176 (1n1r4/Q5pp/qn6/p7/7R/3k4/p2P1R1K/r2B1b2 w - - 0 1)
van der Scheur, D
1st Prize, Schakend Nederland, 1979
#2
6 + 11
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Sa4
- 2.Qe3#
- 1...Sd5
- 2.Rd4#
- 2.Qd4#
- 1...S6d7
- 2.Rd4#
- 2.Qe3#
- 2.Qd4#
- 1...Sa8
- 2.Qe3#
- 1...Sc8
- 2.Qe3#
- 1...g5
- 2.Qxh7#
- 1...Sa4
- Tries
- 1.Qxb6?
- threat
- 2.Qe3#
- 2.Qb3#
- 1...Rxd1
- 2.Qb3#
- 1...Rd4
- 2.Rxd4#
- 2.Qxd4#
- 2.Qb3#
- 1...Be2
- 2.Qe3#
- 1...Qc4
- 2.Qe3#
- 1...Qb5
- 2.Qe3#
- 2.Qxb5#
- 1...Qb7
- 2.Qe3#
- 1...Qc8
- 2.Qe3#
- 1...Qa7
- 2.Qb3#
- 2.Qb5#
- 1...Rb1
- 2.Qe3#
- 1...Rc1
- 2.Qe3#
- 1...Rc8
- 2.Rd4#
- 2.Qe3#
- 2.Qd4#
- 1...Re8
- 2.Rd4#
- 2.Qd4#
- 2.Qb3#
- 1...a4
- 2.Qe3#
- 1...Qxb6!
- threat
- 1.Qxa6+?
- 1...Sc4
- 2.Qxc4#
- 1...Sxa6!
- 1...Sc4
- 1.Qc7?
- threat
- 2.Bc2#
- 2.Qg3#
- 2.Qc2#
- 2.Qc3#
- 1...Rxd1
- 2.Qc3#
- 1...Be2
- 2.Qc2#
- 2.Qc3#
- 1...Qc4
- 2.Qg3#
- 1...Qb7
- 2.Bc2#
- 2.Qc2#
- 2.Qc3#
- 1...Qc8
- 2.Bc2#
- 2.Qg3#
- 1...Qa8
- 2.Bc2#
- 2.Qc2#
- 2.Qc3#
- 1...Rc1
- 2.Qg3#
- 1...Rd4
- 2.Bc2#
- 2.Qc2#
- 2.Qc3#
- 1...Rd6
- 2.Bc2#
- 2.Qc2#
- 2.Qc3#
- 1...Rc8
- 2.Bc2#
- 2.Qg3#
- 1...Re8
- 2.Bc2#
- 2.Qc2#
- 2.Qc3#
- 1...Rf8
- 2.Bc2#
- 2.Qc2#
- 2.Qc3#
- 1...Bg2
- 2.Bc2#
- 2.Qc2#
- 2.Qc3#
- 1...Sa4
- 2.Bc2#
- 2.Qg3#
- 2.Qc2#
- 1...Sd5
- 2.Bc2#
- 2.Qc2#
- 1...Sc6
- 2.Qg3#
- 1...Sc4!
- threat
- 1.Qe7?
- threat
- 2.Qa3#
- 2.Qe3#
- 2.Qe4#
- 1...Rxd1
- 2.Qe4#
- 1...Be2
- 2.Qxe2#
- 2.Qe3#
- 1...Qc4
- 2.Qe3#
- 1...Qb5
- 2.Qe3#
- 2.Qe4#
- 1...Qb7
- 2.Qa3#
- 2.Qe3#
- 1...Qc8
- 2.Qe3#
- 2.Qe4#
- 1...Qa8
- 2.Qa3#
- 2.Qe3#
- 1...Rb1
- 2.Qe3#
- 2.Qe4#
- 1...Rc1
- 2.Qe3#
- 2.Qe4#
- 1...Rd6
- 2.Qe3#
- 2.Qe4#
- 1...Rc8
- 2.Qe3#
- 2.Qe4#
- 1...Re8
- 2.Qa3#
- 1...Bg2
- 2.Qa3#
- 2.Qe2#
- 2.Qe3#
- 1...Sa4
- 2.Qe3#
- 2.Qe4#
- 1...Sc4
- 2.Qe4#
- 1...Sd5
- 2.Qe4#
- 1...Rd4!
- threat
- 1.Qf7?
- threat
- 2.Qb3#
- 2.Qf3#
- 2.Qf5#
- 1...Rxd1
- 2.Qb3#
- 2.Qf5#
- 1...Qc4
- 2.Qf3#
- 1...Qb5
- 2.Qf3#
- 1...Qb7
- 2.Qb3#
- 1...Qc8
- 2.Qf3#
- 1...Qa8
- 2.Qb3#
- 1...Rb1
- 2.Qf3#
- 2.Qf5#
- 1...Rc1
- 2.Qf3#
- 2.Qf5#
- 1...Rd4
- 2.Qb3#
- 1...Rd5
- 2.Qf3#
- 1...Rc8
- 2.Qf3#
- 2.Qf5#
- 1...Re8
- 2.Qb3#
- 1...Rf8
- 2.Qb3#
- 1...Bg2
- 2.Qb3#
- 1...Bh3
- 2.Qb3#
- 2.Qf3#
- 1...Sa4
- 2.Qf3#
- 2.Qf5#
- 1...Sc4
- 2.Qf5#
- 1...Sd5
- 2.Qf5#
- 1...a4
- 2.Qf3#
- 2.Qf5#
- 1...g6
- 2.Qb3#
- 2.Qf3#
- 1...Be2!
- threat
- 1.Qxb6?
- Keys
- 1.Qxg7!
- threat
- 2.Qc3#
- 2.Qg3#
- 2.Qxh7#
- 1...Rxd1
- 2.Qc3#
- 2.Qxh7#
- 1...Rd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Be2
- 2.Qc3#
- 1...Qc4
- 2.Qg3#
- 1...Qb5
- 2.Qc3#
- 2.Qg3#
- 1...Qb7
- 2.Qc3#
- 1...Qc8
- 2.Qg3#
- 1...Qa7
- 2.Qc3#
- 2.Qg3#
- 1...Qa8
- 2.Qc3#
- 1...Rc1
- 2.Qg3#
- 2.Qxh7#
- 1...Rd5
- 2.Qc3#
- 2.Qg3#
- 1...Rd6
- 2.Qc3#
- 2.Qg3#
- 1...Rd7
- 2.Qc3#
- 2.Qg3#
- 1...Rc8
- 2.Rd4#
- 2.Qd4#
- 2.Qg3#
- 2.Qxh7#
- 1...Re8
- 2.Rd4#
- 2.Qc3#
- 2.Qd4#
- 1...Rf8
- 2.Rd4#
- 2.Qc3#
- 2.Qd4#
- 1...Rg8
- 2.Rd4#
- 2.Qc3#
- 2.Qd4#
- 1...Rh8
- 2.Rd4#
- 2.Qc3#
- 2.Qd4#
- 2.Qg3#
- 1...Bg2
- 2.Qc3#
- 1...Bh3
- 2.Qc3#
- 2.Qg3#
- 1...Sa4
- 2.Qg3#
- 1...Sc4
- 2.Qc3#
- 1...Sd5
- 2.Rd4#
- 2.Qd4#
- 1...S6d7
- 2.Rd4#
- 2.Qc3#
- 2.Qd4#
- 2.Qg3#
- 1...Sa8
- 2.Qc3#
- 2.Qg3#
- 1...Sc8
- 2.Qc3#
- 2.Qg3#
- 1...h5
- 2.Qc3#
- 2.Qg3#
- 2.Qg6#
- 2.Qh7#
- 1...h6
- 2.Qc3#
- 2.Qg3#
- 2.Qg6#
- 2.Qh7#
- threat
- 1.Qxg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 3
- Sets
- S(g);OGATE::QAR1(F)
- P(h);OGATE::QAB(F),XP(i)
- Tries
- Try
- Q(F);XS(g)
- Threat
- DUALS(2)
- Vars
- R(a);XB(A)::QAR2(F)
- B(b);::QAR1(F)
- Q(f);::QAR1(F)
- R(a);::QAR1(F)
- P(e);::QAR1(F)
- Refutation
- Q(f);XQ(F)
- Try
- Q(F);CHECK,XQ(f)
- Vars
- S(g);N_GUARD,P_SPINS(g)::QAB1(F),XS(g)
- Refutation
- S(j);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(4)
- Vars
- R(a);XB(A)::QAR1(F)
- Q(f);::QAR(F)
- R(a);::QAR(F)
- S(j);::QAR(F)
- Refutation
- S(g);
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- R(a);XB(A)::QAB1(F)
- Q(f);::QAR1(F)
- R(k);::QAR(F)
- S(g);::QAB1(F)
- Refutation
- R(k);
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- Q(f);::QAR2(F)
- R(k);::QAR2(F)
- B(b);::QAR2(F)
- S(g);::QAB(F)
- Refutation
- B(b);
- Try
- Actual
- Q(F);XP(h)
- Threat
- DUALS(3)
- Vars
- B(b);::QAR1(F)
- Q(f);::QAR(F)
- Q(f);::QAR1(F)
- S(g);::QAR(F)
- S(g);::QAR1(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).