MESON Chess Problem Database
Problem Display
PID: 241771 (8/8/8/8/1p6/3K4/6N1/QNrk4 w - - 0 1)
Szentgyorgy, Erno
Magyar Sakkvilag, 1928
#2
4 + 3
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rxb1
- 2.Qxb1#
- 1...Rc2
- 2.Sc3#
- 1...Rc3+
- 2.Sxc3#
- 1...Rc4
- 2.Sc3#
- 1...Rc5
- 2.Sc3#
- 1...Rc6
- 2.Sc3#
- 1...Rc7
- 2.Sc3#
- 1...Rc8
- 2.Sc3#
- 1...b3
- 2.Sc3#
- 1...Rxb1
- Tries
- 1.Qb2?
- threat
- 2.Qd2#
- 2.Qe2#
- 1...Rxb1
- 2.Qxb1#
- 2.Qc2#
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rc4
- 2.Qd2#
- 1...Rc5
- 2.Qd2#
- 1...Rc6
- 2.Qd2#
- 1...Rc7
- 2.Qd2#
- 1...Rc8
- 2.Qd2#
- 1...Rc3+!
- threat
- 1.Qd4?
- threat
- 2.Qg1#
- 2.Qg4#
- 1...Rxb1
- 2.Qg1#
- 1...Rc2
- 2.Qg1#
- 1...Rc4
- 2.Qg1#
- 1...Rc5
- 2.Qg1#
- 1...Rc6
- 2.Qg1#
- 1...Rc7
- 2.Qg1#
- 1...Rc8
- 2.Qg1#
- 1...Rc3+!
- threat
- 1.Qe5?
- threat
- 2.Qe1#
- 2.Qe2#
- 2.Qh5#
- 1...Rxb1
- 2.Qe1#
- 1...Rc2
- 2.Qe1#
- 1...Rc4
- 2.Qe1#
- 1...Rc5
- 2.Qe1#
- 1...Rc6
- 2.Qe1#
- 1...Rc7
- 2.Qe1#
- 1...Rc8
- 2.Qe1#
- 1...Rc3+!
- threat
- 1.Qf6?
- threat
- 2.Qf1#
- 2.Qf3#
- 1...Rxb1
- 2.Qf1#
- 1...Rc2
- 2.Qf1#
- 1...Rc4
- 2.Qf1#
- 1...Rc5
- 2.Qf1#
- 1...Rc6
- 2.Qf1#
- 1...Rc7
- 2.Qf1#
- 1...Rc8
- 2.Qf1#
- 1...Rc3+!
- threat
- 1.Qh8?
- threat
- 2.Qh1#
- 2.Qh5#
- 1...Rxb1
- 2.Qh1#
- 1...Rc2
- 2.Qh1#
- 1...Rc4
- 2.Qh1#
- 1...Rc5
- 2.Qh1#
- 1...Rc6
- 2.Qh1#
- 1...Rc7
- 2.Qh1#
- 1...Rc8
- 2.Qh1#
- 1...Rc3+!
- threat
- 1.Qa2?
- threat
- 2.Qd2#
- 2.Qe2#
- 1...Rxb1
- 2.Qxb1#
- 2.Qc2#
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rc4
- 2.Qd2#
- 1...Rc5
- 2.Qd2#
- 1...Rc6
- 2.Qd2#
- 1...Rc7
- 2.Qd2#
- 1...Rc8
- 2.Qd2#
- 1...Rc3+!
- threat
- 1.Qb2?
- Keys
- 1.Qa4+!
- 1...Rc2
- 2.Qxc2#
- 1...b3
- 2.Qg4#
- 1...Rc2
- 1.Qa4+!
FEATURES
- Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 7
- Sets
- R(a);OGATE,P_SPINR(a),XS(B)::QAR2(A),XR(a)
- R(a);::QAR(A)+S(B),DCHECK
- R(a);CHECK::QAR(A)+S(B),DCHECK,XR(a)
- P(c);N_GUARD::S(B)
- Tries
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(a);N_GUARD::QAB1(A),XR(a)
- R(a);::QAR1(A)
- Refutation
- R(a);CHECK
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(a);XS(B)::QAR(A)
- R(a);::QAR(A)
- Refutation
- R(a);CHECK
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- R(a);XS(B)::QAR1(A)
- R(a);::QAR1(A)
- Refutation
- R(a);CHECK
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(a);XS(B)::QAR2(A)
- R(a);::QAR2(A)
- Refutation
- R(a);CHECK
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(a);XS(B)::QAR(A)
- R(a);::QAR(A)
- Refutation
- R(a);CHECK
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(a);N_GUARD::QAB1(A),XR(a)
- R(a);::QAR1(A)
- Refutation
- R(a);CHECK
- Try
- Actual
- Q(A);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
- P(c);OGATE,P_SPINP(c)::QAB(A)
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).