MESON Chess Problem Database
Problem Display
PID: 61116 (K2N4/8/2Qp4/4p1n1/3k1p2/B1R5/6q1/7B w - - 0 1)
Bettmann, Henry Wald
Good Companions (May), 1920
#2
6 + 6
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qh3
- 2.Qc4#
- 1...Qg1
- 2.Qc4#
- 1...Qb2
- 2.Qc4#
- 1...Qc2
- 2.Qc4#
- 1...Qd2
- 2.Qc4#
- 1...Qf2
- 2.Qc4#
- 1...Qh2
- 2.Qc4#
- 1...Qg3
- 2.Qc4#
- 1...Qg4
- 2.Qc4#
- 1...Sf3
- 2.Se6#
- 2.Qc4#
- 1...Sh3
- 2.Se6#
- 1...Se4
- 2.Se6#
- 2.Qc4#
- 1...Se6
- 2.Sxe6#
- 1...Sf7
- 2.Se6#
- 1...Sh7
- 2.Se6#
- 1...f3
- 2.Qc4#
- 1...Qh3
- Tries
- 1.Bxg2?
- threat
- 2.Qc4#
- 1...d5
- 2.Qc5#
- 1...e4!
- threat
- 1.Bxg2?
- Keys
- 1.Bb2!
- 1...Qxc6+
- 2.Sxc6#
- 1...Qxh1
- 2.Ra3#
- 2.Rb3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 1...Qxb2
- 2.Qc4#
- 1...e4
- 2.Qxd6#
- 1...d5
- 2.Qa4#
- 1...Qf1
- 2.Ra3#
- 2.Rb3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 2.Qd5#
- 2.Qb6#
- 2.Qxd6#
- 1...Qf3
- 2.Rxf3#
- 1...Qh3
- 2.Rf3#
- 2.Rg3#
- 2.Rxh3#
- 2.Qa4#
- 2.Qd5#
- 2.Qc4#
- 2.Qb6#
- 2.Qxd6#
- 1...Qe4
- 2.Ra3#
- 2.Rb3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 1...Qd5
- 2.Ra3#
- 2.Rb3#
- 2.Rg3#
- 2.Rh3#
- 2.Qxd5#
- 1...Qg1
- 2.Ra3#
- 2.Rb3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 2.Qa4#
- 2.Qd5#
- 2.Qc4#
- 2.Qb6#
- 2.Qxd6#
- 1...Qc2
- 2.Qd5#
- 2.Qc4#
- 2.Qb6#
- 2.Qxd6#
- 1...Qd2
- 2.Qa4#
- 2.Qd5#
- 2.Qc4#
- 2.Qb6#
- 2.Qxd6#
- 1...Qe2
- 2.Qd5#
- 2.Qb6#
- 2.Qxd6#
- 1...Qf2
- 2.Qa4#
- 2.Qd5#
- 2.Qc4#
- 2.Qb6#
- 2.Qxd6#
- 1...Qh2
- 2.Qa4#
- 2.Qd5#
- 2.Qc4#
- 2.Qb6#
- 2.Qxd6#
- 1...Qg3
- 2.Rf3#
- 2.Rxg3#
- 2.Qa4#
- 2.Qd5#
- 2.Qc4#
- 2.Qb6#
- 2.Qxd6#
- 1...Qg4
- 2.Ra3#
- 2.Rb3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 2.Qa4#
- 2.Qd5#
- 2.Qc4#
- 2.Qb6#
- 2.Qxd6#
- 1...Sf3
- 2.Se6#
- 2.Qc4#
- 1...Sh3
- 2.Se6#
- 1...Se4
- 2.Se6#
- 2.Qc4#
- 1...Se6
- 2.Sxe6#
- 1...Sf7
- 2.Se6#
- 1...Sh7
- 2.Se6#
- 1...f3
- 2.Qc4#
- 1...Qxc6+
- 1.Bb2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 8
- Sets
- Q(a);N_PINQ(D)::QAR1(D)
- S(e);N_GUARD::S(F)
- S(e);N_GUARD::S(F),XS(e)
- P(c);N_PINQ(D)::QAR1(D)
- Tries
- Try
- B(A);N_SPINQ(D),XQ(a)
- Threat
- QAR1(D)
- Vars
- P(f);N_GUARD::QAB1(D)
- Refutation
- P(d);
- Try
- Actual
- B(B);
- Vars
- Q(a);CHECK,XQ(D)::S(F),XQ(a)
- Q(a);N_PINQ(D),XB(B)::QAR1(D)
- P(d);N_PINQ(D),SBLOCK::QAR2(D),XP(f)
- P(f);N_PINQ(D),SBLOCK::QAR(D)
- Q(a);N_GUARD::B(B)+R(C),XQ(a)
- S(e);N_GUARD::S(F)
- S(e);N_GUARD::S(F),XS(e)
- P(c);N_PINQ(D)::QAR1(D)
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).