MESON Chess Problem Database
Problem Display
PID: 72516 (6b1/1N2N3/1n5n/q4p2/p2k1B2/6pK/1P6/1BQ5 w - - 0 1)
Sammelius, Carel Johan Robert
Tijdschrift vd NSB, 1931
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Qc5#
- 1...Qd2
- 2.Qc5#
- 1...Qc3
- 2.Qxc3#
- 1...Qb5
- 2.Qc3#
- 1...Qc5
- 2.Qxc5#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 1...Qa6
- 2.Qc3#
- 2.Qc5#
- 1...Qa7
- 2.Qc3#
- 2.Qc5#
- 1...Qa8
- 2.Qc3#
- 2.Qc5#
- 1...Bc4
- 2.Qe3#
- 2.Qg1#
- 1...Sd5
- 2.Sc6#
- 1...Qe1
- Tries
- 1.Sxa5?
- threat
- 2.Sac6#
- 2.Qe3#
- 2.Qg1#
- 2.Qc3#
- 1...Bc4
- 2.Qe3#
- 2.Qg1#
- 1...Bd5
- 2.Qe3#
- 2.Qg1#
- 2.Qc3#
- 1...Sd5
- 2.Sac6#
- 2.Sec6#
- 2.Qc4#
- 1...Sg4
- 2.Sac6#
- 2.Qc3#
- 1...Sc4!
- threat
- 1.Bxg3?
- threat
- 2.Qf4#
- 1...Qd2
- 2.Qc5#
- 1...f4
- 2.Qxf4#
- 1...Qe1
- 2.Qc5#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 1...Sd5
- 2.Sc6#
- 1...Bd5!
- threat
- 1.Be5+?
- 1...Qxe5
- 2.Qc3#
- 1...Kxe5!
- 1...Qxe5
- 1.Bd6?
- threat
- 2.Qf4#
- 1...Qd2
- 2.Qc5#
- 1...Qe1
- 2.Qc5#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 1...Sd5
- 2.Sc6#
- 1...f4
- 2.Qxf4#
- 1...Bd5!
- threat
- 1.Bxh6?
- threat
- 2.Qf4#
- 1...Qe1
- 2.Qc5#
- 1...Qd2
- 2.Qc5#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 1...Bd5
- 2.Bg7#
- 1...Sd5
- 2.Sc6#
- 1...f4
- 2.Qxf4#
- 1...Ke5!
- threat
- 1.Bc7?
- threat
- 2.Qf4#
- 1...Qd2
- 2.Qc5#
- 1...Qe1
- 2.Qc5#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 1...Sd5
- 2.Sc6#
- 1...f4
- 2.Qxf4#
- 1...Bd5!
- threat
- 1.Bb8?
- threat
- 2.Qf4#
- 1...Qd2
- 2.Qc5#
- 1...Qe1
- 2.Qc5#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 1...Sd5
- 2.Sc6#
- 1...f4
- 2.Qxf4#
- 1...Bd5!
- threat
- 1.Qc2?
- threat
- 2.Qd3#
- 1...Qc3
- 2.Qxc3#
- 1...Qd2
- 2.Qc5#
- 1...Qb5
- 2.Qc3#
- 1...Qa6
- 2.Qc3#
- 2.Qc5#
- 1...Bc4!
- threat
- 1.Sxa5?
- Keys
- 1.Bg5!
- threat
- 2.Qf4#
- 1...Ke5
- 2.Qe3#
- 1...Qe1
- 2.Qc5#
- 1...Qd2
- 2.Qc5#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 1...Bd5
- 2.Bf6#
- 1...Sd5
- 2.Sc6#
- 1...f4
- 2.Qxf4#
- threat
- 1.Bg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- Q(d);N_GUARD::QAB1(B)
- Q(d);N_GUARD::QAB1(B),XQ(d)
- S(f);SBLOCK::S(G)
- Tries
- Try
- S(F);XQ(d)
- Threat
- DUALS(4)
- Refutation
- S(f);
- Try
- B(E);XP(a)
- Threat
- QAR2(B)
- Vars
- Q(d);N_GUARD::QAB1(B)
- P(e);::QAR2(B),XP(e)
- S(f);SBLOCK::S(G)
- Refutation
- B(h);
- Try
- B(E);CHECK
- Vars
- Q(d);SBLOCK,XB(E)::QAB1(B)
- Refutation
- K(c);S_FLIGHT,XB(E)
- Try
- B(E);
- Threat
- QAR2(B)
- Vars
- Q(d);N_GUARD::QAB1(B)
- S(f);SBLOCK::S(G)
- P(e);::QAR2(B),XP(e)
- Refutation
- B(h);
- Try
- B(E);XS(g)
- Threat
- QAR2(B)
- Vars
- Q(d);N_GUARD::QAB1(B)
- Q(d);N_GUARD,SBLOCK::QAB1(B)
- B(h);S_CUTQ(d)::B(E)
- S(f);SBLOCK::S(G)
- P(e);::QAR2(B),XP(e)
- Refutation
- K(c);S_FLIGHT
- Try
- B(E);
- Threat
- QAR2(B)
- Vars
- Q(d);N_GUARD::QAB1(B)
- S(f);SBLOCK::S(G)
- P(e);::QAR2(B),XP(e)
- Refutation
- B(h);
- Try
- B(E);
- Threat
- QAR2(B)
- Vars
- Q(d);N_GUARD::QAB1(B)
- S(f);SBLOCK::S(G)
- P(e);::QAR2(B),XP(e)
- Refutation
- B(h);
- Try
- Q(B);
- Threat
- QAR1(B)
- Vars
- Q(d);N_GUARD::QAB1(B),XQ(d)
- Q(d);N_GUARD::QAB1(B)
- Refutation
- B(h);
- Try
- Actual
- B(E);
- Threat
- QAR2(B)
- Vars
- K(c);S_FLIGHT::QAR2(B)
- Q(d);N_GUARD::QAB1(B)
- Q(d);N_GUARD,SBLOCK::QAB1(B)
- B(h);S_CUTQ(d)::B(E)
- S(f);SBLOCK::S(G)
- P(e);::QAR2(B),XP(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).