MESON Chess Problem Database
Problem Display
PID: 204262 (8/8/8/8/8/5K1Q/5BRp/5k1q w - - 0 1)
Lazard, Frederic
La Strategie, 1925
#2
4 + 3
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxg2+
- 2.Qxg2#
- 1...Qg1
- 2.Rxg1#
- 1...Qxg2+
- Tries
- 1.Ke3?
- threat
- 2.Rg1#
- 1...Qg1
- 2.Rxg1#
- 1...Qxg2!
- threat
- 1.Bg3?
- 1...Qxg2+
- 2.Qxg2#
- 1...Qg1!
- 1...Qxg2+
- 1.Bh4?
- 1...Qxg2+
- 2.Qxg2#
- 1...Qg1!
- 1...Qxg2+
- 1.Qxh2?
- threat
- 2.Qxh1#
- 1...Qxg2+
- 2.Qxg2#
- 1...Qg1
- 2.Rxg1#
- 2.Qxg1#
- 1...Qxh2!
- threat
- 1.Qg3?
- 1...Qxg2+
- 2.Qxg2#
- 1...Qg1!
- 1...Qxg2+
- 1.Ke3?
- Keys
- 1.Qg4!
- threat
- 2.Qc4#
- 1...Qxg2+
- 2.Qxg2#
- threat
- 1.Qg4!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(B)::QAB1(D),XQ(b)
- Q(b);N_PINR(B)::QAB(D)+R(B),DCHECK,XQ(b)
- Tries
- Try
- K(C);N_SPINR(B),P-FLIGHT
- Threat
- QAB(D)+R(B),DCHECK
- Vars
- Q(b);P_PINB(A)::QAB(D)+R(B),DCHECK,XQ(b)
- Refutation
- Q(b);P_SPINQ(b),XR(B)
- Try
- B(A);
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(B)::QAB1(D),XQ(b)
- Refutation
- Q(b);N_PINR(B)
- Try
- B(A);
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(B)::QAB1(D),XQ(b)
- Refutation
- Q(b);N_PINR(B)
- Try
- Q(D);XP(c)
- Threat
- QAR2(D),XQ(b)
- Vars
- Q(b);CHECK,OGATE,XR(B)::QAB1(D),XQ(b)
- Refutation
- Q(b);N_PINR(B),XQ(D)
- Try
- Q(D);
- Vars
- Q(b);CHECK,OGATE,XR(B)::QAB1(D),XQ(b)
- Refutation
- Q(b);N_PINR(B)
- Try
- Actual
- Q(D);
- Threat
- QAB(D)
- Vars
- Q(b);CHECK,OGATE,XR(B)::QAB1(D),XQ(b)
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).