MESON Chess Problem Database
Problem Display
PID: 45888 (1Qb5/1q4b1/p7/2B5/2N5/K1kN4/B1P1p3/2R5 w - - 0 1)
Lubton, Yehuda
Schweizerische Schachzeitung, 1981
#2
8 + 6
| 3841 | The Art of Israeli Chess Composition | 1983 |
| 5454 | Near Snap | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qg2
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qf3
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qe4
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qd5
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qc6
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qa8
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qb2+
- 2.Qxb2#
- 1...Qb3+
- 2.Qxb3#
- 1...Qb4+
- 2.Qxb4#
- 1...Qa7
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qc7
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qd7
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qe7
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Qf7
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Be5
- 2.Qxe5#
- 1...Bh6
- 2.Qe5#
- 1...Bf8
- 2.Qe5#
- 1...Qh1
- Tries
- 1.Sdb2?
- threat
- 2.Sa4#
- 1...Qxb2+
- 2.Qxb2#
- 1...Qb3+
- 2.Qxb3#
- 2.cxb3#
- 1...Qb4+
- 2.Qxb4#
- 1...Qc6
- 2.Qb3#
- 2.Qb4#
- 1...Qb5
- 2.Qg3#
- 1...Qd7
- 2.Qb3#
- 2.Qb4#
- 1...Bd7!
- threat
- 1.Qxb7?
- threat
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 2.Qxg7#
- 1...e1Q
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...e1R
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Bd4
- 2.Bb4#
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Be5
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Bf6
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Bh6
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Bf8
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Bh8
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...Bd7
- 2.Qb2#
- 2.Qb3#
- 2.Qb4#
- 1...a5
- 2.Qb2#
- 2.Qb3#
- 2.Qxg7#
- 1...Bxb7!
- threat
- 1.Sdb2?
- Keys
- 1.Qg3!
- threat
- 2.Qe1#
- 1...Qb2+
- 2.Sdxb2#
- 1...Qb3+
- 2.cxb3#
- 1...Qb4+
- 2.Sxb4#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Qh1
- 2.Qxg7#
- 1...Bh6
- 2.Qe5#
- threat
- 1.Qg3!
Anticipated by 102652(1956)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 5
- REMOVED MATES = 2
- Sets
- Q(d);CHECK,OGATE::QAB1(H),XQ(d)
- Q(d);CHECK,OGATE::QAR1(H),XQ(d)
- B(e);N_GUARD::QAB(H),XB(e)
- B(e);N_GUARD::QAB(H)
- B(e);N_GUARD,P_PINB(G)::QAB(H)
- Tries
- Try
- S(E);
- Threat
- S(E)
- Vars
- Q(d);CHECK,OGATE,XS(E)::QAB1(H),XQ(d)
- Q(d);CHECK,OGATE::QAB1(H),XQ(d)
- Q(d);N_GUARD::QAR(H)
- Refutation
- B(f);
- Try
- Q(H);XQ(d)
- Threat
- DUALS(4)
- Refutation
- B(f);XQ(H)
- Try
- Actual
- Q(H);
- Threat
- QAB(H)
- Vars
- Q(d);CHECK,N_GUARD::QAR(H)+S(E),XQ(d)
- Q(d);CHECK,OGATE::R(A)+P(C),XQ(d)
- P(a);::QAB(H),XQ(a)
- P(a);::QAB(H),XS(a)
- P(a);::QAB(H),XB(a)
- P(a);::QAB(H),XR(a)
- Q(d);N_GUARD::QAB(H),XB(e)
- B(e);N_GUARD::QAB(H)
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).