MESON Chess Problem Database
Problem Display
PID: 87928 (8/K7/8/2n5/1Qn5/8/k7/1R6 w - - 0 1)
Petkov, Petko Andonov
Problemista, 1962
#2
3 + 3
| 6490 | yacpdb | 2009 |
| 5454 | Near Snap | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Sb2
- 2.Qxb2#
- 1...Sd2
- 2.Qb2#
- 1...Sa3
- 2.Qb2#
- 1...Se3
- 2.Qb2#
- 1...Sa5
- 2.Qb2#
- 1...Se5
- 2.Qb2#
- 1...Sb6
- 2.Qb2#
- 1...Sd6
- 2.Qb2#
- 1...Sb3
- 2.Qxb3#
- 1...Sd3
- 2.Qb3#
- 1...Sa4
- 2.Qb3#
- 1...Se4
- 2.Qb3#
- 1...Sa6
- 2.Qb3#
- 1...Se6
- 2.Qb3#
- 1...Sb7
- 2.Qb3#
- 1...Sd7
- 2.Qb3#
- 1...Sb2
- Tries
- 1.Ka8?
- 1...Sb2
- 2.Qxb2#
- 1...Sb3
- 2.Qxb3#
- 1...Sd2
- 2.Qb2#
- 1...Sa3
- 2.Qb2#
- 1...Se3
- 2.Qb2#
- 1...Sa5
- 2.Qb2#
- 1...Se5
- 2.Qb2#
- 1...Sd6
- 2.Qb2#
- 1...Sd3
- 2.Qb3#
- 1...Sa4
- 2.Qb3#
- 1...Se4
- 2.Qb3#
- 1...Sa6
- 2.Qb3#
- 1...Se6
- 2.Qb3#
- 1...Sb7
- 2.Qb3#
- 1...Sd7
- 2.Qb3#
- 1...Sb6+!
- 1...Sb2
- 1.Qc3?
- threat
- 2.Ra1#
- 2.Qa1#
- 1...Sb3
- 2.Qxb3#
- 1...Sb2
- 2.Qxb2#
- 1...Kxb1!
- threat
- 1.Qb6?
- 1...Ka3
- 2.Ra1#
- 1...Sb2
- 2.Qxb2#
- 1...Sb3
- 2.Qxb3#
- 1...Sd2
- 2.Qb2#
- 1...Sa3
- 2.Qb2#
- 1...Se3
- 2.Qb2#
- 1...Sa5
- 2.Qb2#
- 1...Se5
- 2.Qb2#
- 1...Sd6
- 2.Qb2#
- 1...Sd3
- 2.Qb3#
- 1...Sa4
- 2.Qb3#
- 1...Se4
- 2.Qb3#
- 1...Sa6
- 2.Qb3#
- 1...Se6
- 2.Qb3#
- 1...Sb7
- 2.Qb3#
- 1...Sd7
- 2.Qb3#
- 1...Sxb6!
- 1...Ka3
- 1.Ka8?
- Keys
- 1.Qb5!
- 1...Ka3
- 2.Ra1#
- 1...Sb2
- 2.Qxb2#
- 1...Sb3
- 2.Qxb3#
- 1...Sd2
- 2.Qb2#
- 1...Sa3
- 2.Qb2#
- 1...Se3
- 2.Qb2#
- 1...Sa5
- 2.Qb2#
- 1...Se5
- 2.Qb2#
- 1...Sb6
- 2.Qb2#
- 1...Sd6
- 2.Qb2#
- 1...Sd3
- 2.Qb3#
- 1...Sa4
- 2.Qb3#
- 1...Se4
- 2.Qb3#
- 1...Sa6
- 2.Qb3#
- 1...Se6
- 2.Qb3#
- 1...Sb7
- 2.Qb3#
- 1...Sd7
- 2.Qb3#
- 1...Ka3
- 1.Qb5!
Anticipated by 227903(1926)
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(b);N_GUARD::QAR1(B),XS(b)
- S(b);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAB1(B),XS(c)
- S(c);N_GUARD::QAB1(B)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- S(b);N_GUARD::QAR1(B),XS(b)
- S(c);N_GUARD::QAB1(B),XS(c)
- S(b);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAB1(B)
- Refutation
- S(b);CHECK
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- S(c);N_GUARD::QAB1(B),XS(c)
- S(b);N_GUARD::QAR1(B),XS(b)
- Refutation
- K(a);S_FLIGHT,XR(A)
- Try
- Q(B);
- Vars
- K(a);P-FLIGHT::R(A)
- S(b);N_GUARD::QAR1(B),XS(b)
- S(c);N_GUARD::QAB1(B),XS(c)
- S(b);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAB1(B)
- Refutation
- S(b);XQ(B)
- Try
- Actual
- Q(B);
- Vars
- K(a);P-FLIGHT::R(A)
- S(b);N_GUARD::QAR1(B),XS(b)
- S(c);N_GUARD::QAB1(B),XS(c)
- S(b);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAB1(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).