MESON Chess Problem Database
Problem Display
PID: 233259 (5n2/3rR3/1p5K/3kP1Qb/1PR5/pB6/q7/8 w - - 0 1)
Muller, Dieter
Freie Presse, 1974
#2
7 + 7
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qd2
- 2.Qxd2#
- 1...Rd6+
- 2.e6#
- 1...Se6
- 2.Rxd7#
- 1...Qd2
- Tries
- 1.Qe3?
- threat
- 2.Rc5#
- 2.Qd4#
- 2.Qd3#
- 2.Qe4#
- 1...Qxb3
- 2.Qd4#
- 2.Qe4#
- 1...Rxe7
- 2.Rc5#
- 1...Qb1
- 2.Rc5#
- 2.Qd4#
- 1...Qa1
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc5#
- 2.Rc7#
- 2.Rc8#
- 2.Qe4#
- 1...Qb2
- 2.Rc5#
- 2.Qe4#
- 1...Qc2
- 2.Rxc2#
- 2.Rc5#
- 2.Qd4#
- 1...Qd2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc5#
- 2.Rc7#
- 2.Rc8#
- 2.Qxd2#
- 1...Qe2
- 2.Rc5#
- 2.Qd4#
- 1...Qf2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc5#
- 2.Rc7#
- 2.Rc8#
- 2.Qe4#
- 1...Qg2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc5#
- 2.Rc7#
- 2.Rc8#
- 2.Qd4#
- 2.Qd3#
- 1...Be2
- 2.Rc5#
- 2.Qd4#
- 2.Qe4#
- 1...Bf3
- 2.Rc5#
- 2.Qd4#
- 2.Qd3#
- 2.Qxf3#
- 1...Bg6
- 2.Rc5#
- 2.Qd4#
- 1...Se6
- 2.Rc5#
- 2.Rxd7#
- 2.Qe4#
- 1...Rd6+!
- threat
- 1.Qf4?
- threat
- 2.Rc5#
- 2.Qd4#
- 2.Qe4#
- 1...Qxb3
- 2.Qd4#
- 2.Qe4#
- 1...Rxe7
- 2.Rc5#
- 1...Qb1
- 2.Rc5#
- 2.Qd4#
- 1...Qa1
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc5#
- 2.Rc7#
- 2.Rc8#
- 2.Qe4#
- 1...Qb2
- 2.Rc5#
- 2.Qe4#
- 1...Qc2
- 2.Rxc2#
- 2.Rc5#
- 2.Qd4#
- 1...Qd2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc5#
- 2.Rc7#
- 2.Rc8#
- 2.Qxd2#
- 1...Qe2
- 2.Rc5#
- 2.Qd4#
- 1...Qf2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc5#
- 2.Rc7#
- 2.Rc8#
- 2.Qe4#
- 1...Qg2
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc5#
- 2.Rc7#
- 2.Rc8#
- 2.Qd4#
- 1...Bf3
- 2.Rc5#
- 2.Qxf3#
- 2.Qd4#
- 1...Bg6
- 2.Rc5#
- 2.Qd4#
- 1...Se6
- 2.Rc5#
- 2.Rxd7#
- 2.Qe4#
- 1...Rd6+!
- threat
- 1.Qg2+?
- 1...Bf3
- 2.Qxf3#
- 1...Qxg2!
- 1...Bf3
- 1.Qg8+?
- 1...Se6
- 2.Qxe6#
- 1...Bf7!
- 1...Se6
- 1.Qe3?
- Keys
- 1.Qf6!
- threat
- 2.Qc6#
- 1...Qd2+
- 2.Rf4#
- 1...Rxe7
- 2.Qd6#
- 1...Rd6
- 2.Qxd6#
- 1...Rc7
- 2.Qd6#
- 1...Se6
- 2.Rxd7#
- 2.Qxe6#
- threat
- 1.Qf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- Q(a);N_GUARD,P_PINQ(E)::QAR(E),XQ(a)
- R(f);CHECK,SBLOCK::QAR(E)+P(D)
- S(g);N_GUARD,SBLOCK::R(G),XR(f)
- Tries
- Try
- Q(E);
- Threat
- DUALS(4)
- Vars
- R(f);XR(G)::B(A)+R(C),DCHECK
- Refutation
- R(f);CHECK
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- R(f);XR(G)::B(A)+R(C),DCHECK
- Refutation
- R(f);CHECK
- Try
- Q(E);CHECK
- Vars
- B(d);N_GUARD,P_SPINB(d)::QAB(E),XB(d)
- Refutation
- Q(a);XQ(E)
- Try
- Q(E);CHECK
- Vars
- S(g);N_GUARD,P_SPINS(g)::QAB1(E),XS(g)
- Refutation
- B(d);P_SPINB(d)
- Try
- Actual
- Q(E);
- Threat
- QAB1(E)
- Vars
- Q(a);CHECK,N_GUARD::B(A)+R(C)
- R(f);N_GUARD,XR(G)::QAR1(E)
- R(f);N_GUARD,P_PINQ(E)::QAR1(E),XR(f)
- R(f);N_GUARD::QAR1(E)
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).