MESON Chess Problem Database
Problem Display
PID: 85760 (8/2p5/4nK2/8/Q3pk2/3R4/4B3/8 w - - 0 1)
Speckmann, Werner
Rochade, 1978
#2
4 + 4
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Tries
- 1.Qa1?
- threat
- 2.Qe5#
- 2.Qf1#
- 1...exd3
- 2.Qe5#
- 1...e3
- 2.Qe5#
- 1...Sg5
- 2.Qe5#
- 1...Sd4!
- threat
- 1.Qd4?
- threat
- 2.Qf2#
- 2.Qe3#
- 2.Qe5#
- 1...Sg5
- 2.Qe3#
- 2.Qe5#
- 1...Sxd4!
- threat
- 1.Qa5?
- threat
- 2.Qe5#
- 2.Qf5#
- 1...exd3
- 2.Qe5#
- 1...e3
- 2.Qe5#
- 1...Sd4
- 2.Qxc7#
- 2.Qe5#
- 2.Qg5#
- 1...Sc5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 2.Qe5#
- 2.Qg5#
- 1...c5!
- threat
- 1.Qa1?
- Keys
- 1.Qc6!
- 1...exd3
- 2.Qf3#
- 1...e3
- 2.Qf3#
- 1...Sd4
- 2.Qxc7#
- 1...Sc5
- 2.Qxc7#
- 1...Sg5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...Sd8
- 2.Qxc7#
- 1...Sf8
- 2.Qxc7#
- 1...exd3
- 1.Qc6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 0
- Sets
- Tries
- Try
- Q(C);N_PINP(a)
- Threat
- DUALS(2)
- Vars
- P(a);XR(B)::QAB1(C)
- P(a);::QAB1(C)
- S(c);::QAB1(C)
- Refutation
- S(c);
- Try
- Q(C);
- Threat
- DUALS(3)
- Refutation
- S(c);N_SPINP(a),XQ(C)
- Try
- Q(C);N_PINP(a)
- Threat
- DUALS(2)
- Vars
- P(a);XR(B)::QAB1(C)
- P(a);::QAB1(C)
- S(c);N_GUARD::QAB(C),XP(d)
- Refutation
- P(d);
- Try
- Actual
- Q(C);N_PINP(a)
- Vars
- P(a);OGATE,XR(B)::QAR1(C)
- P(a);OGATE::QAR1(C)
- S(c);N_GUARD::QAB(C),XP(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).