MESON Chess Problem Database
Problem Display
PID: 170512 (8/8/2P5/qb1BQ3/5R1p/4N3/1n5R/b3k2K w - - 0 1)
Hoffmann, Martin Wolfgang
Basler Nachrichten, 1971
#2
7 + 6
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qc3
- 2.Qxc3#
- 1...Qb6
- 2.Qc3#
- 1...Qc7
- 2.Qc3#
- 1...Qd8
- 2.Qc3#
- 1...Qa2
- 2.Qc3#
- 1...Qa4
- 2.Qc3#
- 1...Qa6
- 2.Qc3#
- 1...Qa7
- 2.Qc3#
- 1...Qa8
- 2.Qc3#
- 1...Bf1
- 2.Rxf1#
- 1...Ba4
- 2.Rf1#
- 1...Bxc6
- 2.Rf1#
- 1...Sd1
- 2.Sc2#
- 1...Sd3
- 2.Rf1#
- 1...Sa4
- 2.Qxa1#
- 1...Sc4
- 2.Rf1#
- 1...Qc3
- Tries
- 1.Sd1+?
- 1...Be2
- 2.Qxe2#
- 1...Kxd1!
- 1...Be2
- 1.Sf1+?
- 1...Be2
- 2.Qxe2#
- 1...Kd1!
- 1...Be2
- 1.Sg4+?
- 1...Be2
- 2.Qxe2#
- 1...Kd1!
- 1...Be2
- 1.Sf5+?
- 1...Be2
- 2.Qxe2#
- 1...Kd1!
- 1...Be2
- 1.Bc4?
- threat
- 2.Re2#
- 2.Rf1#
- 1...Bxc4
- 2.Qxa5#
- 1...Sxc4
- 2.Rf1#
- 1...Qd2
- 2.Rf1#
- 1...Sd3
- 2.Rf1#
- 1...Bxc6+!
- threat
- 1.Qxb2?
- threat
- 2.Qc1#
- 2.Qb1#
- 2.Qf2#
- 1...Qd2
- 2.Qxd2#
- 1...Qc3
- 2.Qf2#
- 1...Qb4
- 2.Qc1#
- 2.Qf2#
- 1...Qa2
- 2.Qc1#
- 1...Qa3
- 2.Qd2#
- 2.Qf2#
- 1...Qa4
- 2.Qd2#
- 2.Qf2#
- 1...Be2
- 2.Rxe2#
- 2.Qxe2#
- 1...Bd3
- 2.Qc1#
- 2.Qf2#
- 1...Ba4
- 2.Re2#
- 2.Rf1#
- 2.Qe2#
- 2.Qf2#
- 1...Bxb2!
- threat
- 1.Qd4?
- threat
- 2.Sc2#
- 1...Qd2
- 2.Qxd2#
- 1...Qc3
- 2.Qxc3#
- 1...Qa4
- 2.Qc3#
- 2.Qd2#
- 1...Ba4
- 2.Rf1#
- 1...Sd3
- 2.Rf1#
- 1...Bd3!
- threat
- 1.Qh5?
- threat
- 2.Sc2#
- 2.Qxh4#
- 1...Be2
- 2.Rxe2#
- 2.Qxe2#
- 1...Qc3
- 2.Qxh4#
- 1...Qd8
- 2.Sc2#
- 1...Qa4
- 2.Qxh4#
- 1...Bd3
- 2.Qxh4#
- 1...Ba4
- 2.Re2#
- 2.Rf1#
- 2.Qe2#
- 2.Qxh4#
- 1...Sd1
- 2.Sc2#
- 2.Qxd1#
- 1...Sd3
- 2.Sc2#
- 2.Re2#
- 2.Rf1#
- 2.Qd1#
- 2.Qe2#
- 1...h3
- 2.Sc2#
- 2.Qh4#
- 1...Qd2!
- threat
- 1.Sd1+?
- Keys
- 1.Bb3!
- threat
- 2.Sc4#
- 1...Bxc6+
- 2.Sd5#
- 1...Be2
- 2.Qxa5#
- 1...Qd2
- 2.Sg2#
- 1...Qc3
- 2.Qxc3#
- 1...Qb6
- 2.Qc3#
- 1...Qc7
- 2.Qc3#
- 1...Qa7
- 2.Qc3#
- 1...Bf1
- 2.Rxf1#
- 2.Qxa5#
- 1...Bd3
- 2.Qxa5#
- 1...Ba4
- 2.Sd5#
- 2.Rf1#
- 2.Qxa5#
- 1...Bc4
- 2.Qxa5#
- 1...Ba6
- 2.Qxa5#
- 1...Sd1
- 2.Sc2#
- 1...Sd3
- 2.Rf1#
- 1...Sa4
- 2.Qxa1#
- 1...Sc4
- 2.Rf1#
- threat
- 1.Bb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 7
- Sets
- Q(e);N_GUARD::QAB(F),XQ(e)
- Q(e);N_GUARD::QAB(F)
- B(f);N_GUARD::R1(D),XB(f)
- B(f);N_GUARD::R1(D)
- B(f);N_GUARD,P_PINB(E),XP(G)::R1(D)
- S(c);SBLOCK::QAR(F)+S(C),DCHECK
- S(c);S_CUTB(f)::R1(D)
- S(c);OGATE::QAR(F),XB(a)
- Tries
- Try
- S(C);CHECK
- Vars
- B(f);N_GUARD,P_SPINB(f)::QAR1(F),XB(f)
- Refutation
- K(b);P-FLIGHT,XS(C)
- Try
- S(C);CHECK
- Vars
- B(f);N_GUARD,P_SPINB(f)::QAR1(F),XB(f)
- Refutation
- K(b);P-FLIGHT
- Try
- S(C);CHECK
- Vars
- B(f);N_GUARD,P_SPINB(f)::QAR1(F),XB(f)
- Refutation
- K(b);P-FLIGHT
- Try
- S(C);CHECK
- Vars
- B(f);N_GUARD,P_SPINB(f)::QAR1(F),XB(f)
- Refutation
- K(b);P-FLIGHT
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- B(f);OGATE,XB(E)::QAB(F),XQ(e)
- S(c);XB(E)::R1(D)
- Q(e);::R1(D)
- S(c);::R1(D)
- Refutation
- B(f);CHECK,XP(G)
- Try
- Q(F);XS(c)
- Threat
- DUALS(3)
- Vars
- Q(e);N_GUARD::QAB1(F),XQ(e)
- Q(e);::QAB1(F)
- Q(e);::QAR2(F)
- Refutation
- B(a);XQ(F)
- Try
- Q(F);
- Threat
- S(C)
- Vars
- Q(e);N_GUARD::QAB1(F),XQ(e)
- Q(e);N_GUARD::QAB(F),XQ(e)
- B(f);N_GUARD::R1(D)
- S(c);S_CUTB(f)::R1(D)
- Refutation
- B(f);
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(e);::QAB(F),XP(d)
- Q(e);::S(C)
- B(f);::QAB(F),XP(d)
- Refutation
- Q(e);
- Try
- Actual
- B(E);
- Threat
- QAR(F)+S(C)
- Vars
- B(f);CHECK,N_GUARD,XP(G)::QAR(F)+S(C)
- B(f);OGATE::QAB(F),XQ(e)
- Q(e);SBLOCK::QAR(F)+S(C),DCHECK
- Q(e);N_GUARD::QAB(F),XQ(e)
- Q(e);N_GUARD::QAB(F)
- S(c);SBLOCK::QAR(F)+S(C),DCHECK
- S(c);S_CUTB(f)::R1(D)
- S(c);OGATE::QAR(F),XB(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).