MESON Chess Problem Database
Problem Display
PID: 233791 (1r1R4/2p4b/B1pP2p1/Knk1N1R1/1p1NP3/p6q/8/3Q4 w - - 0 1)
Schneider, Michael
Freie Presse, 1969
#2
9 + 10
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Sb3#
- 2.Se6#
- 1...Qg2
- 2.Sb3#
- 2.Se6#
- 1...Qg4
- 2.Sb3#
- 1...Qf5
- 2.Sb3#
- 1...Qe6
- 2.Sxe6#
- 1...Qd7
- 2.Sb3#
- 1...Qc8
- 2.Sb3#
- 1...Qh1
- 2.Sb3#
- 2.Se6#
- 1...Qh2
- 2.Sb3#
- 2.Se6#
- 1...Qb3
- 2.Sxb3#
- 1...Qc3
- 2.Se6#
- 1...Qd3
- 2.Se6#
- 1...Qe3
- 2.Se6#
- 1...Qf3
- 2.Se6#
- 1...Qg3
- 2.Se6#
- 1...Qh4
- 2.Sb3#
- 2.Se6#
- 1...Qh5
- 2.Sb3#
- 2.Se6#
- 1...Qh6
- 2.Sb3#
- 2.Se6#
- 1...Sc3
- 2.Sb3#
- 1...Sxd4
- 2.Sd3#
- 1...Sxd6
- 2.Sd7#
- 1...Sa7
- 2.Sg4#
- 1...Qf1
- Tries
- 1.Sef3+?
- 1...Kc4
- 2.Qc2#
- 2.Qb3#
- 1...Qf5!
- 1...Kc4
- 1.Sd7+?
- 1...Kc4
- 2.Rc5#
- 1...Kxd6!
- 1...Kc4
- 1.Rg3?
- threat
- 2.Sb3#
- 1...Qxg3
- 2.Se6#
- 1...Sxd4
- 2.Sd3#
- 1...Qe6
- 2.Sxe6#
- 1...b3
- 2.Sxb3#
- 1...Bg8!
- threat
- 1.Rf5?
- threat
- 2.Se6#
- 1...Qxf5
- 2.Sb3#
- 1...Sxd4
- 2.Sd3#
- 1...Qb3
- 2.Sxb3#
- 1...Bg8!
- threat
- 1.Qc2+?
- 1...Qc3
- 2.Sb3#
- 2.Se6#
- 1...Sc3
- 2.Sb3#
- 1...Kxd4!
- 1...Qc3
- 1.Qc1+?
- 1...Qc3
- 2.Sb3#
- 2.Se6#
- 1...Sc3
- 2.Sb3#
- 1...Kxd4!
- 1...Qc3
- 1.Qg1?
- threat
- 2.Sb3#
- 2.Se6#
- 1...Sxd4
- 2.Sd3#
- 2.Sg4#
- 1...Qd7
- 2.Sxb5#
- 1...Qe6
- 2.Sb3#
- 2.Sxb5#
- 2.Sxe6#
- 1...Qb3
- 2.Sxb3#
- 2.Se6#
- 1...b3
- 2.Sxb3#
- 2.Se6#
- 1...Rxd8!
- threat
- 1.Qd3?
- threat
- 2.Sb3#
- 2.Sg4#
- 2.Qc4#
- 1...Qxd3
- 2.Se6#
- 1...Rxd8
- 2.Sb3#
- 1...Sxd4
- 2.Qc4#
- 1...Sxd6
- 2.Sb3#
- 2.Sd7#
- 1...cxd6
- 2.Sb3#
- 2.Sd7#
- 2.Qc4#
- 1...Qd7
- 2.Sb3#
- 1...Qf5
- 2.Sb3#
- 2.Qc4#
- 1...Qf1
- 2.Sb3#
- 2.Se6#
- 2.Sef3#
- 1...Qg4
- 2.Sb3#
- 2.Sxg4#
- 2.Qc4#
- 1...Qe6
- 2.Sxe6#
- 1...Qc8
- 2.Sb3#
- 2.Qc4#
- 1...Qh2
- 2.Sb3#
- 2.Se6#
- 2.Qc4#
- 1...Qe3
- 2.Sb3#
- 2.Se6#
- 2.Qc4#
- 1...Qf3
- 2.Sb3#
- 2.Se6#
- 2.Sexf3#
- 2.Qc4#
- 1...Qg3
- 2.Sb3#
- 2.Se6#
- 2.Qc4#
- 1...Qh4
- 2.Sb3#
- 2.Se6#
- 2.Qc4#
- 1...Qh5
- 2.Sb3#
- 2.Se6#
- 2.Qc4#
- 1...Qh6
- 2.Sb3#
- 2.Se6#
- 2.Qc4#
- 1...Sc3
- 2.Sb3#
- 2.Qc4#
- 1...b3
- 2.Sxb3#
- 2.Sg4#
- 2.Qc4#
- 1...Bg8!
- threat
- 1.Sef3+?
- Keys
- 1.Qd2!
- threat
- 2.Qxb4#
- 1...Sxd4
- 2.Sd3#
- 1...Sxd6
- 2.Sd7#
- 1...Qb3
- 2.Sxb3#
- 1...Qc3
- 2.Se6#
- 1...Sc3
- 2.Sb3#
- 1...Sa7
- 2.Sg4#
- 1...b3
- 2.Qb4#
- threat
- 1.Qd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- Q(b);N_GUARD::S(B)
- Q(b);N_GUARD::S(B),XQ(b)
- S(d);S_CUTQ(b)::S(B)
- S(d);SBLOCK,XS(B)::R(F)+S(E),DCHECK
- S(d);SBLOCK,XP(H)::R(F)+S(E),DCHECK
- S(d);::R(F)+S(E)
- Tries
- Try
- S(E);CHECK
- Refutation
- Q(b);P_SPINQ(b)
- Try
- S(E);CHECK
- Vars
- K(e);P-FLIGHT,P_SPINS(d)::R1(F)
- Refutation
- K(e);S_FLIGHT,XP(H)
- Try
- R(F);
- Threat
- S(B)
- Vars
- Q(b);N_GUARD,XR(F)::S(B)
- S(d);SBLOCK,XS(B)::S(E)
- Q(b);N_GUARD::S(B),XQ(b)
- P(c);::S(B),XP(c)
- Refutation
- B(i);
- Try
- R(F);
- Threat
- S(B)
- Vars
- Q(b);N_GUARD,XR(F)::S(B)
- S(d);SBLOCK,XS(B)::R(F)+S(E),DCHECK
- Q(b);N_GUARD::S(B),XQ(b)
- Refutation
- B(i);
- Try
- Q(A);CHECK
- Vars
- S(d);P_SPINS(d)::S(B)
- Refutation
- K(e);S_FLIGHT,XS(B)
- Try
- Q(A);CHECK
- Vars
- S(d);P_SPINS(d)::S(B)
- Refutation
- K(e);S_FLIGHT,XS(B)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD::QAB(A)+S(B),XS(d)
- Refutation
- R(j);XR(I)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- Q(b);N_GUARD,XQ(A)::S(B)
- R(j);XR(I)::S(B)
- S(d);XS(B)::QAR1(A)
- Q(b);::S(B)
- Q(b);N_GUARD::S(B),XQ(b)
- Refutation
- B(i);
- Try
- Actual
- Q(A);
- Threat
- QAB1(A),XP(c)
- Vars
- S(d);SBLOCK,XS(B)::R(F)+S(E),DCHECK
- S(d);SBLOCK,XP(H)::R(F)+S(E),DCHECK
- Q(b);N_GUARD::S(B),XQ(b)
- Q(b);N_GUARD::S(B)
- S(d);S_CUTQ(b)::S(B)
- S(d);::R(F)+S(E)
- P(c);::QAB1(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).