MESON Chess Problem Database
Problem Display
PID: 83549 (3K4/2B5/3N3R/R1bqk3/b1P1p2N/2Pp4/3P4/4rn1Q w - - 0 1)
Ellerman, Arnoldo
Good Companions, 1920
#2
10 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qc6
- 2.Sf7#
- 1...Qe6
- 2.Sf7#
- 1...Qb7
- 2.Sxb7#
- 2.Sf7#
- 1...Qf7
- 2.Sxf7#
- 1...Qa8+
- 2.Sc8#
- 1...Qg8+
- 2.Se8#
- 1...Qxd6+
- 2.Bxd6#
- 1...Bd7
- 2.Sf7#
- 1...Be3
- 2.Qxe4#
- 1...Bxd6
- 2.Bxd6#
- 1...Sxd2
- 2.Qh2#
- 1...Sh2
- 2.Qxh2#
- 1...Se3
- 2.Qh2#
- 1...Qc6
- Tries
- 1.Qf3?
- threat
- 2.Qf5#
- 2.Qf6#
- 1...Qa8+
- 2.Sc8#
- 1...Qg8+
- 2.Se8#
- 1...Qxd6+
- 2.Bxd6#
- 1...Qxc4
- 2.Qf5#
- 1...Qe6
- 2.Sf7#
- 1...Qf7
- 2.Sxf7#
- 1...Bd7
- 2.Sf7#
- 2.Qf6#
- 1...Se3
- 2.Qg3#
- 2.Qf6#
- 1...Sg3
- 2.Qxg3#
- 2.Qf6#
- 1...exf3!
- threat
- 1.Qxe4+?
- 1...Qxe4
- 2.Sdf5#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Se8#
- 1...Rxe4!
- 1...Qxe4
- 1.Qh2+?
- 1...Sg3
- 2.Qxg3#
- 1...Sxh2!
- 1...Sg3
- 1.Qh3?
- threat
- 2.Qf5#
- 1...Qa8+
- 2.Sc8#
- 1...Qg8+
- 2.Se8#
- 1...Qxd6+
- 2.Bxd6#
- 1...Qe6
- 2.Sf7#
- 1...Qf7
- 2.Sxf7#
- 1...Bd7
- 2.Sf7#
- 1...Se3
- 2.Qh2#
- 2.Qg3#
- 1...Sg3
- 2.Qxg3#
- 1...Kf4!
- threat
- 1.Qf3?
- Keys
- 1.Qg2!
- threat
- 2.Qg5#
- 1...Qa8+
- 2.Sc8#
- 1...Qg8+
- 2.Se8#
- 1...Qxd6+
- 2.Bxd6#
- 1...Kf4
- 2.Sg6#
- 1...Qe6
- 2.Sf7#
- 1...Qf7
- 2.Sxf7#
- 1...Bd7
- 2.Sf7#
- 1...Be3
- 2.Qxe4#
- 1...Se3
- 2.Qh2#
- 2.Qg3#
- 1...Sg3
- 2.Qxg3#
- threat
- 1.Qg2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- Q(g);N_PINS(G),P_SPINB(f)::B(I)+S(G),DCHECK
- Q(g);N_PINS(G),P_SPINB(f)::B(I)+S(G),DCHECK,XQ(g)
- Q(g);CHECK,N_PINS(G),P_SPINB(f)::B(I)+S(G)
- Q(g);CHECK,OGATE,P_SPINB(f),P_SPINQ(g),XS(G)::B(I),XQ(g)
- B(d);N_PINS(G)::B(I)+S(G),DCHECK
- B(f);P_SPINQ(g),S_CUTR(a)::QAR1(A),XP(e)
- B(f);OGATE,P_SPINB(f),P_SPINQ(g),XS(G)::B(I),XB(f)
- S(b);N_GUARD,XP(B)::QAB(A)
- S(b);N_GUARD::QAB(A),XS(b)
- S(b);N_GUARD::QAB(A)
- Tries
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(g);CHECK,N_PINS(G),P_SPINB(f)::B(I)+S(G)
- Q(g);CHECK,OGATE,P_SPINB(f),P_SPINQ(g),XS(G)::B(I),XQ(g)
- Q(g);N_PINS(G),P_SPINB(f),XP(D)::QAR1(A)
- Q(g);N_PINS(G),P_SPINB(f)::B(I)+S(G),DCHECK
- Q(g);N_PINS(G),P_SPINB(f)::B(I)+S(G),DCHECK,XQ(g)
- Refutation
- P(e);XQ(A)
- Try
- Q(A);CHECK,XP(e)
- Refutation
- R(a);XQ(A)
- Try
- Q(A);CHECK
- Vars
- S(b);N_GUARD,P_SPINS(b)::QAB(A),XS(b)
- Refutation
- S(b);XQ(A)
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- Q(g);CHECK,N_PINS(G),P_SPINB(f)::B(I)+S(G)
- Q(g);CHECK,OGATE,P_SPINB(f),P_SPINQ(g),XS(G)::B(I),XQ(g)
- Q(g);N_PINS(G),P_SPINB(f)::B(I)+S(G),DCHECK
- Q(g);N_PINS(G),P_SPINB(f)::B(I)+S(G),DCHECK,XQ(g)
- B(d);N_PINS(G)::B(I)+S(G),DCHECK
- S(b);N_GUARD::QAB(A),XS(b)
- Refutation
- K(h);S_FLIGHT
- Try
- Actual
- Q(A);
- Threat
- QAR2(A)
- Vars
- Q(g);CHECK,N_PINS(G),P_SPINB(f)::B(I)+S(G)
- Q(g);CHECK,OGATE,P_SPINB(f),P_SPINQ(g),XS(G)::B(I),XQ(g)
- K(h);S_FLIGHT::S(E)
- Q(g);N_PINS(G),P_SPINB(f)::B(I)+S(G),DCHECK
- Q(g);N_PINS(G),P_SPINB(f)::B(I)+S(G),DCHECK,XQ(g)
- B(d);N_PINS(G)::B(I)+S(G),DCHECK
- B(f);P_SPINQ(g),S_CUTR(a)::QAR1(A),XP(e)
- S(b);N_GUARD::QAB(A),XS(b)
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).