MESON Chess Problem Database
Problem Display
PID: 21221 (2n3K1/4bQ1p/4R3/2pkB1nR/2b1N1B1/p6p/1q1N2r1/8 w - - 0 1)
Guidelli, Giorgio
Good Companions (July), 1917
#2
8 + 11
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qc3
- 2.Sxc3#
- 1...Qxe5
- 2.Rd6#
- 1...Qb1
- 2.Sc3#
- 1...Qa2
- 2.Sc3#
- 1...Qb5
- 2.Sc3#
- 1...Qb6
- 2.Sc3#
- 1...Qb7
- 2.Sc3#
- 1...Qb8
- 2.Sc3#
- 1...Bf6
- 2.Sxf6#
- 1...Bf8
- 2.Sf6#
- 1...Sf3
- 2.Ra6#
- 2.Rb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Reh6#
- 1...Sxe4
- 2.Ra6#
- 2.Rb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Reh6#
- 1...Sxe6
- 2.Qxe6#
- 1...Qc3
- Tries
- 1.Bxb2?
- threat
- 2.Ra6#
- 2.Rb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Reh6#
- 2.Qf5#
- 1...Rxd2
- 2.Qf5#
- 1...Bd6
- 2.Rxd6#
- 2.Qb7#
- 1...Sd6
- 2.Rxd6#
- 1...Rf2
- 2.Rd6#
- 2.Rf6#
- 1...Ba6
- 2.Rxa6#
- 2.Rb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Reh6#
- 2.Qf5#
- 1...Bf6
- 2.Sxf6#
- 2.Ra6#
- 2.Rb6#
- 2.Rd6#
- 2.Rxf6#
- 2.Qb7#
- 1...Sb6
- 2.Rxb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Reh6#
- 2.Qf5#
- 1...h6
- 2.Ra6#
- 2.Rb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Rexh6#
- 2.Qf5#
- 1...axb2!
- threat
- 1.Bc3?
- threat
- 2.Ra6#
- 2.Rb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Reh6#
- 2.Qf5#
- 1...Qxd2
- 2.Qf5#
- 1...Rxd2
- 2.Qf5#
- 1...Bd6
- 2.Rxd6#
- 1...Sd6
- 2.Rxd6#
- 1...Qb6
- 2.Rxb6#
- 2.Rd6#
- 2.Qf5#
- 1...Qb8
- 2.Ra6#
- 2.Rb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Reh6#
- 1...Rf2
- 2.Rd6#
- 2.Rf6#
- 1...Ba6
- 2.Rxa6#
- 2.Rb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Reh6#
- 2.Qf5#
- 1...Bf6
- 2.Sxf6#
- 2.Ra6#
- 2.Rb6#
- 2.Rd6#
- 2.Rxf6#
- 1...Sb6
- 2.Rxb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Reh6#
- 2.Qf5#
- 1...h6
- 2.Ra6#
- 2.Rb6#
- 2.Rd6#
- 2.Rf6#
- 2.Rg6#
- 2.Rexh6#
- 2.Qf5#
- 1...Qxc3!
- threat
- 1.Bxb2?
- Keys
- 1.Bf3!
- threat
- 2.Sc3#
- 2.Sxg5#
- 2.Sf6#
- 1...Sxf3+
- 2.Rg6#
- 1...Sxe4+
- 2.Rg6#
- 1...Sxe6+
- 2.Sg3#
- 1...Sxf7+
- 2.Sg5#
- 1...Qxe5
- 2.Rd6#
- 1...Sd6
- 2.Sc3#
- 2.Sf6#
- 1...Qc3
- 2.Sxc3#
- 2.Sf6#
- 1...Qd4
- 2.Sc3#
- 2.Sf6#
- 1...Qb1
- 2.Sc3#
- 2.Sf6#
- 1...Qc2
- 2.Sc3#
- 2.Sf6#
- 1...Qb3
- 2.Sc3#
- 2.Sf6#
- 1...Re2
- 2.Sc3#
- 2.Sf6#
- 1...Rf2
- 2.Sc3#
- 2.Sf6#
- 1...Rg3
- 2.Sc3#
- 2.Sf6#
- 1...Rg4
- 2.Sc3#
- 2.Sf6#
- 1...Be2
- 2.Sc3#
- 2.Sf6#
- 1...Bd3
- 2.Sc3#
- 2.Sf6#
- 1...Bf6
- 2.Sc3#
- 2.Sxg5#
- 2.Sxf6#
- threat
- 1.Bf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 9
- Sets
- Q(a);N_GUARD::S(B),XQ(a)
- Q(a);SBLOCK,XB(D)::QAB(G)+R(F),DCHECK
- Q(a);N_GUARD::S(B)
- B(i);N_GUARD::S(B),XB(i)
- B(i);N_GUARD::S(B)
- S(h);OGATE,P_PINB(C),P_SPINS(h),XR(F)::QAB1(G),XS(h)
- Tries
- Try
- B(D);P_PINS(h),XQ(a)
- Threat
- DUALS(7)
- Vars
- R(b);XS(A)::QAR2(G)
- S(k);::QAB(G)+R(F),DCHECK,XS(k)
- Refutation
- P(c);XB(D)
- Try
- B(D);P_PINS(h)
- Threat
- DUALS(7)
- Vars
- Q(a);XS(A)::QAR2(G)
- R(b);XS(A)::QAR2(G)
- B(i);::QAB(G)+R(F),DCHECK,XB(i)
- S(k);::QAB(G)+R(F),DCHECK,XS(k)
- Refutation
- Q(a);XB(D)
- Try
- Actual
- B(C);
- Threat
- DUALS(3)
- Vars
- S(h);CHECK,N_GUARD,XB(C)::QAB(G)+R(F)
- S(h);CHECK,N_GUARD,P_SPINS(h),XS(B)::QAB(G)+R(F)
- S(h);CHECK,N_GUARD,P_SPINS(h),XR(F)::B(C)+S(B)
- S(h);CHECK,XQ(G)::B(C)+S(B)
- Q(a);SBLOCK,XB(D)::QAB(G)+R(F),DCHECK
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).