MESON Chess Problem Database
Problem Display
PID: 230836 (6n1/1q3p2/3P1k2/6R1/3NQP2/2N1bK2/8/8 w - - 0 1)
Schaller, Klaus
Stella Polaris, 1968
#2
7 + 5
SOLUTION
- SOUND
- Sets
- 1...Qxe4+
- 2.Sxe4#
- 1...Qd5
- 2.Sxd5#
- 1...Qa6
- 2.Sd5#
- 2.Qf5#
- 2.Qe5#
- 1...Qc8
- 2.Sd5#
- 2.Qe5#
- 1...Qb1
- 2.Sd5#
- 2.Qe5#
- 1...Qb2
- 2.Sd5#
- 2.Qf5#
- 2.Qe5#
- 1...Qb3
- 2.Qf5#
- 2.Qe5#
- 1...Qb4
- 2.Sd5#
- 2.Qf5#
- 2.Qe5#
- 1...Qb6
- 2.Sd5#
- 2.Qf5#
- 2.Qe5#
- 1...Qa7
- 2.Sd5#
- 2.Qf5#
- 2.Qe5#
- 1...Qc7
- 2.Sd5#
- 2.Qf5#
- 2.Qe5#
- 1...Qd7
- 2.Sd5#
- 2.Qe5#
- 1...Qe7
- 2.Sd5#
- 2.Qf5#
- 1...Qb8
- 2.Sd5#
- 2.Qf5#
- 2.Qe5#
- 1...Qxe4+
- Tries
- 1.Kxe3?
- threat
- 2.Qf5#
- 2.Qe5#
- 1...Qxe4+
- 2.Sxe4#
- 1...Qd5
- 2.Sxd5#
- 1...Qc8
- 2.Sd5#
- 2.Qe5#
- 1...Qb1
- 2.Sd5#
- 2.Qe5#
- 1...Qd7
- 2.Sd5#
- 2.Qe5#
- 1...Qe7
- 2.Sd5#
- 1...Sh6
- 2.Qe5#
- 1...Se7
- 2.Qe5#
- 1...Qb5!
- threat
- 1.Qxb7?
- threat
- 2.Se4#
- 2.Sd5#
- 1...Bxf4
- 2.Se4#
- 1...Se7
- 2.Se4#
- 2.Qxe7#
- 1...Bxd4!
- threat
- 1.Kxe3?
- Keys
- 1.Qd5!
- threat
- 2.Se4#
- 1...Qxd5+
- 2.Sxd5#
- 1...Qb1
- 2.Qe5#
- 1...Qe7
- 2.Qf5#
- threat
- 1.Qd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- Q(c);CHECK,XQ(D)::S(A),XQ(c)
- Q(c);N_GUARD::S(A),XQ(c)
- Tries
- Try
- K(B);N_SPINQ(D),P-FLIGHT,XB(a)
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,XQ(D)::S(A),XQ(c)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINQ(D)::S(A)
- S(e);::QAB1(D)
- Refutation
- Q(c);
- Try
- Q(D);N_SPINQ(D),XQ(c)
- Threat
- DUALS(2)
- Vars
- B(a);XP(E)::S(A)
- Refutation
- B(a);XS(C)
- Try
- Actual
- Q(D);
- Threat
- S(A)
- Vars
- Q(c);CHECK,XQ(D)::S(A),XQ(c)
- Q(c);N_PINQ(D)::QAB1(D)
- Q(c);N_PINQ(D)::QAR1(D)
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).