MESON Chess Problem Database
Problem Display
PID: 21693 (Nn6/P3P3/p2kPpN1/nqb2P2/1p6/2Q1R3/3B2B1/1K1R4 w - - 0 1)
Bettmann, Henry Wald
Good Companions (May), 1920
#2
12 + 8
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.axb8Q#
- 2.axb8B#
- 2.e8S#
- 1...Qe2
- 2.axb8Q#
- 2.axb8B#
- 2.e8S#
- 1...Qa4
- 2.axb8Q#
- 2.axb8B#
- 1...Qc4
- 2.axb8Q#
- 2.axb8B#
- 2.e8S#
- 1...Qb6
- 2.e8S#
- 1...Qb7
- 2.e8S#
- 1...Bxe3
- 2.Qc7#
- 1...Bd4
- 2.Qc7#
- 1...Bxa7
- 2.Qc7#
- 1...Sac6
- 2.e8S#
- 1...Sb7
- 2.axb8Q#
- 2.axb8B#
- 1...Sbc6
- 2.e8S#
- 1...Sd7
- 2.e8S#
- 1...Qf1
- Tries
- 1.Bc1+?
- 1...Bd4
- 2.Qc7#
- 1...Qd3+!
- 1...Bd4
- 1.Be1+?
- 1...Bd4
- 2.Qc7#
- 1...Qd3+!
- 1...Bd4
- 1.Rd3+?
- 1...Bd4
- 2.Qc7#
- 1...Qxd3+!
- 1...Bd4
- 1.Qc4?
- threat
- 2.Bxb4#
- 2.Qd5#
- 2.Qf4#
- 1...Qxc4
- 2.axb8Q#
- 2.axb8B#
- 2.e8S#
- 1...Bxe3
- 2.Bxb4#
- 2.Qc7#
- 1...Bxa7
- 2.Bxb4#
- 2.Qc7#
- 1...Qc6
- 2.Qf4#
- 1...Qa4
- 2.Qd5#
- 2.Qf4#
- 2.axb8Q#
- 2.axb8B#
- 1...Qb7
- 2.Qf4#
- 2.e8S#
- 1...Bd4
- 2.Qc7#
- 1...Bb6
- 2.Bxb4#
- 1...Sb3
- 2.Qd5#
- 2.Qf4#
- 1...Sac6
- 2.Qd5#
- 2.e8S#
- 1...Sbc6
- 2.Qd5#
- 2.e8S#
- 1...Sd7
- 2.Bxb4#
- 2.Qd5#
- 2.e8S#
- 1...b3
- 2.Bb4#
- 2.Qd5#
- 2.Qf4#
- 1...Sxc4!
- threat
- 1.Qxc5+?
- 1...Qxc5
- 2.Bxb4#
- 2.e8S#
- 1...Kxc5!
- 1...Qxc5
- 1.Bc1+?
- Keys
- 1.Qxb4!
- 1...Qd3+
- 2.Rxd3#
- 1...Qxb4+
- 2.Bxb4#
- 1...Bxb4
- 2.Bxb4#
- 1...Qf1
- 2.Qxb8#
- 2.axb8Q#
- 2.axb8B#
- 2.e8S#
- 1...Qe2
- 2.Qf4#
- 2.Qxb8#
- 2.axb8Q#
- 2.axb8B#
- 2.e8S#
- 1...Qa4
- 2.Rd3#
- 2.Qxb8#
- 2.axb8Q#
- 2.axb8B#
- 1...Qc4
- 2.Qxb8#
- 2.axb8Q#
- 2.axb8B#
- 2.e8S#
- 1...Qc6
- 2.Qf4#
- 1...Qd7
- 2.Bc1#
- 2.Be1#
- 2.Bc3#
- 2.Rd3#
- 2.Qf4#
- 1...Qe8
- 2.Bc1#
- 2.Be1#
- 2.Bc3#
- 2.Rd3#
- 2.Qf4#
- 1...Qb6
- 2.Bc1#
- 2.Be1#
- 2.Bc3#
- 2.Rd3#
- 2.e8S#
- 1...Qb7
- 2.e8S#
- 1...Sb3
- 2.Qf4#
- 1...Sc4
- 2.Rd3#
- 1...Sac6
- 2.e8S#
- 1...Sb7
- 2.axb8Q#
- 2.axb8B#
- 1...Sbc6
- 2.e8S#
- 1...Sd7
- 2.e8S#
- 1...Qd3+
- 1.Qxb4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 4
- Sets
- Q(c);N_GUARD::PXS(h)=Q
- Q(c);N_GUARD::P=S
- B(d);OGATE,XR(F)::QAB1(E)
- B(d);OGATE::QAB1(E)
- B(d);OGATE,XP(J)::QAB1(E)
- S(b);S_CUTQ(c)::P=S
- S(b);S_CUTQ(c)::PXS(h)=Q
- S(h);S_CUTQ(c)::P=S
- Tries
- Try
- B(C);CHECK
- Vars
- B(d);OGATE,P_SPINB(d)::QAB1(E)
- Refutation
- Q(c);CHECK,P_SPINQ(c)
- Try
- B(C);CHECK
- Vars
- B(d);OGATE,P_SPINB(d)::QAB1(E)
- Refutation
- Q(c);CHECK,P_SPINQ(c)
- Try
- R(F);CHECK
- Vars
- B(d);OGATE,P_SPINB(d)::QAB1(E)
- Refutation
- Q(c);CHECK,XR(F)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(c);::QAB(E)
- B(d);OGATE::QAB1(E)
- B(d);::R(B)+B(C),DCHECK,XP(a)
- Refutation
- S(b);XQ(E)
- Try
- Q(E);CHECK,XB(d)
- Refutation
- K(f);S_FLIGHT,XQ(E)
- Try
- Actual
- Q(E);P_PINB(d),P_SPINQ(E),XP(a)
- Vars
- Q(c);CHECK,N_GUARD,N_PINQ(E)::R(F),XQ(c)
- Q(c);CHECK,N_SPINB(d),OGATE,XQ(E)::R(B)+B(C),XQ(c)
- B(d);N_SPINB(d),OGATE,XQ(E)::R(B)+B(C),DCHECK,XB(d)
- Q(c);N_PINQ(E)::QAB(E)
- Q(c);N_GUARD::P=S
- S(b);N_PINQ(E)::QAB(E)
- S(b);S_CUTQ(c)::R(F)
- S(b);S_CUTQ(c)::P=S
- S(b);S_CUTQ(c)::PXS(h)=Q
- S(h);S_CUTQ(c)::P=S
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).