MESON Chess Problem Database
Problem Display
PID: 21154 (B4R2/2p1p3/7n/pr1N3K/qp1BkN1R/5p1p/3b4/6Q1 w - - 0 1)
Guidelli, Giorgio
1st Prize, Good Companions (November), 1917
#2
8 + 11
| 3132 | The Good Companion Two-Mover | 1922 |
| 3360 | Simple Two-move Themes | 1924 |
| 133 | The Problemist Supplement | 2004 |
| 56 | The Problemist | 2010 |
SOLUTION
- SOUND
- Sets
- 1...Rxd5+
- 2.Bxd5#
- 1...Rb6
- 2.Sc3#
- 1...Rb8
- 2.Sc3#
- 1...Be1
- 2.Qe3#
- 1...Bc3
- 2.Qe3#
- 1...Be3
- 2.Qxe3#
- 1...Bxf4
- 2.Qe3#
- 1...Sf5
- 2.Sc3#
- 2.Sf6#
- 1...c5
- 2.Sc3#
- 2.Sb6#
- 1...e5
- 2.Sc3#
- 1...Rxd5+
- Tries
- 1.Ba1?
- threat
- 2.Qd4#
- 1...Rxd5+
- 2.Bxd5#
- 1...Bc3
- 2.Qe3#
- 1...Sf7
- 2.Qg6#
- 1...f2
- 2.Qh1#
- 1...Be3
- 2.Qxe3#
- 1...Sf5
- 2.Sf6#
- 1...b3
- 2.Qb1#
- 1...c5
- 2.Sb6#
- 1...e5
- 2.Sc3#
- 1...Qxa1!
- threat
- 1.Bg7?
- threat
- 2.Qd4#
- 1...Rxd5+
- 2.Bxd5#
- 1...Sf7
- 2.Qg6#
- 1...f2
- 2.Qh1#
- 1...Bc3
- 2.Qe3#
- 1...Be3
- 2.Qxe3#
- 1...Sf5
- 2.Sc3#
- 1...b3
- 2.Qb1#
- 1...c5
- 2.Sc3#
- 2.Sb6#
- 1...e5
- 2.Sc3#
- 1...Qa1!
- threat
- 1.Bh8?
- threat
- 2.Qd4#
- 1...Rxd5+
- 2.Bxd5#
- 1...Sf7
- 2.Qg6#
- 1...f2
- 2.Qh1#
- 1...Bc3
- 2.Qe3#
- 1...Be3
- 2.Qxe3#
- 1...Sf5
- 2.Sc3#
- 1...b3
- 2.Qb1#
- 1...c5
- 2.Sc3#
- 2.Sb6#
- 1...e5
- 2.Sc3#
- 1...Qa1!
- threat
- 1.Ba1?
- Keys
- 1.Bb2!
- threat
- 2.Qd4#
- 1...Rxd5+
- 2.Bxd5#
- 1...Bc3
- 2.Qe3#
- 1...Sf7
- 2.Qg6#
- 1...f2
- 2.Qh1#
- 1...Be3
- 2.Qxe3#
- 1...Sf5
- 2.Sf6#
- 1...b3
- 2.Qb1#
- 1...c5
- 2.Sb6#
- 1...e5
- 2.Sc3#
- threat
- 1.Bb2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 4
- Sets
- R(h);CHECK,OGATE,P_SPINR(h),XS(E)::B(G),XR(h)
- R(h);N_PINS(E)::B(G)+S(E),DCHECK
- B(a);N_GUARD::QAR1(A)
- B(a);N_GUARD::QAR1(A),XB(a)
- B(a);N_GUARD,P_SPINB(a),XS(C)::QAR1(A)
- P(k);N_PINS(E)::B(G)+S(E),DCHECK
- Tries
- Try
- B(B);
- Threat
- QAR1(A)
- Vars
- R(h);CHECK,OGATE,P_SPINR(h),XS(E)::B(G),XR(h)
- B(a);N_GUARD::QAR1(A)
- S(i);N_GUARD::QAB(A)
- P(b);OGATEB::QAB(A)
- B(a);N_GUARD::QAR1(A),XB(a)
- S(i);N_PINS(E),SBLOCK::B(G)+S(E),DCHECK
- P(e);S_CUTQ(d)::QAB(A)
- P(j);N_PINS(E)::B(G)+S(E)
- P(k);N_PINS(E),SBLOCK::B(G)+S(E),DCHECK
- Refutation
- Q(d);XB(B)
- Try
- B(B);
- Threat
- QAR1(A)
- Vars
- R(h);CHECK,OGATE,P_SPINR(h),XS(E)::B(G),XR(h)
- S(i);N_GUARD::QAB(A)
- P(b);OGATEB::QAB(A)
- B(a);N_GUARD::QAR1(A)
- B(a);N_GUARD::QAR1(A),XB(a)
- S(i);N_PINS(E)::B(G)+S(E),DCHECK
- P(e);S_CUTQ(d)::QAB(A)
- P(k);N_PINS(E)::B(G)+S(E),DCHECK
- Refutation
- Q(d);
- Try
- B(B);
- Threat
- QAR1(A)
- Vars
- R(h);CHECK,OGATE,P_SPINR(h),XS(E)::B(G),XR(h)
- S(i);N_GUARD::QAB(A)
- P(b);OGATEB::QAB(A)
- B(a);N_GUARD::QAR1(A)
- B(a);N_GUARD::QAR1(A),XB(a)
- S(i);N_PINS(E)::B(G)+S(E),DCHECK
- P(e);S_CUTQ(d)::QAB(A)
- P(k);N_PINS(E)::B(G)+S(E),DCHECK
- Refutation
- Q(d);
- Try
- Actual
- B(B);
- Threat
- QAR1(A)
- Vars
- R(h);CHECK,OGATE,P_SPINR(h),XS(E)::B(G),XR(h)
- B(a);N_GUARD::QAR1(A)
- S(i);N_GUARD::QAB(A)
- P(b);OGATEB::QAB(A)
- B(a);N_GUARD::QAR1(A),XB(a)
- S(i);N_PINS(E),SBLOCK::B(G)+S(E),DCHECK
- P(e);S_CUTQ(d)::QAB(A)
- P(j);N_PINS(E)::B(G)+S(E)
- P(k);N_PINS(E),SBLOCK::B(G)+S(E),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).