MESON Chess Problem Database
Problem Display
PID: 64471 (5N1n/7r/1p1p3r/nPk1bq1R/1p5Q/1Pp4p/4BN2/3R1K2 w - - 0 1)
Ellerman, Arnoldo
1st HM., Good Companions (May), 1921
#2
9 + 12
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Qd4#
- 1...Qc2
- 2.Qd4#
- 1...Qe4
- 2.Sxe4#
- 1...Qe6
- 2.Se4#
- 2.Qd4#
- 1...Qg6
- 2.Qd4#
- 1...Qd7
- 2.Se4#
- 2.Qd4#
- 1...Qc8
- 2.Se4#
- 2.Qd4#
- 1...Qxf2+
- 2.Qxf2#
- 1...Qf3
- 2.Qd4#
- 1...Qg5
- 2.Se4#
- 1...Qxh5
- 2.Se4#
- 1...Qf6
- 2.Qd4#
- 1...Qf7
- 2.Qd4#
- 1...Qxf8
- 2.Qd4#
- 1...Bh2
- 2.Qd4#
- 1...Bg3
- 2.Qd4#
- 1...Bd4
- 2.Qxd4#
- 1...Bf4
- 2.Se4#
- 1...Bf6
- 2.Se6#
- 1...Bg7
- 2.Sd7#
- 1...Sxb3
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sc6
- 2.Qc4#
- 1...Sb7
- 2.Qc4#
- 1...Qb1
- Tries
- 1.Se6+?
- 1...Qxe6
- 2.Se4#
- 2.Qd4#
- 1...Rxe6!
- 1...Qxe6
- 1.Sd7+?
- 1...Qxd7
- 2.Se4#
- 2.Qd4#
- 1...Rxd7!
- 1...Qxd7
- 1.Rxf5?
- threat
- 2.Se4#
- 2.Qd4#
- 1...Rxh4
- 2.Se6#
- 1...Sxb3
- 2.Se4#
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sc6
- 2.Se4#
- 2.Qc4#
- 1...d5!
- threat
- 1.Qe4?
- threat
- 2.Rd5#
- 2.Qd5#
- 1...Qxe4
- 2.Sxe4#
- 1...d5
- 2.Rxd5#
- 2.Qxd5#
- 1...Qe6
- 2.Qe3#
- 2.Qd4#
- 1...Qf3
- 2.Rd5#
- 2.Qd4#
- 1...Qf7
- 2.Qe3#
- 2.Qd4#
- 1...Bh2
- 2.Qe3#
- 2.Qd4#
- 1...Bg3
- 2.Qe3#
- 2.Qd4#
- 1...Bd4
- 2.Qxd4#
- 1...Bf4
- 2.Qd4#
- 1...Bf6
- 2.Se6#
- 1...Bg7
- 2.Sd7#
- 1...Qxf2+!
- threat
- 1.Se6+?
- Keys
- 1.Bc4!
- threat
- 2.Rd5#
- 1...Qd3+
- 2.Sxd3#
- 1...Qxf2+
- 2.Qxf2#
- 1...Sxc4
- 2.Qxc4#
- 1...d5
- 2.Rxd5#
- 1...Qb1
- 2.Qd4#
- 1...Qe4
- 2.Sxe4#
- 1...Qe6
- 2.Sd3#
- 2.Se4#
- 2.Qd4#
- 1...Qf3
- 2.Qd4#
- 1...Qf7
- 2.Qd4#
- 1...Bh2
- 2.Qd4#
- 1...Bg3
- 2.Qd4#
- 1...Bd4
- 2.Qxd4#
- 1...Bf4
- 2.Se4#
- 1...Bf6
- 2.Se6#
- 1...Bg7
- 2.Sd7#
- threat
- 1.Bc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- Q(g);N_PINS(D),P_PINR(A),P_SPINB(f)::QAB1(F)
- Q(g);N_PINS(D),P_SPINB(f)::QAB1(F)
- Q(g);N_PINS(D),P_SPINB(f)::S(D),XQ(g)
- Q(g);CHECK,OGATE,P_SPINB(f),XS(D)::QAB(F),XQ(g)
- Q(g);P_SPINB(f)::QAB1(F)
- Q(g);N_PINS(D)::S(D)
- Q(g);N_PINS(D),XR(H)::S(D)
- Q(g);P_SPINB(f),XS(I)::QAB1(F)
- B(f);N_GUARD,P_SPINQ(g)::QAB1(F)
- B(f);N_GUARD,P_SPINQ(g)::QAB1(F),XB(f)
- B(f);N_PINS(D),P_SPINQ(g)::S(D)
- B(f);P_SPINQ(g),S_CUTR(j)::S(I)
- B(f);P_SPINQ(g),S_CUTR(k)::S(I)
- S(d);N_GUARD,XP(E)::QAR1(F)
- S(d);N_GUARD::QAR1(F),XS(d)
- S(d);N_GUARD::QAR1(F)
- Tries
- Try
- S(I);CHECK
- Refutation
- R(j);XS(I)
- Try
- S(I);CHECK
- Refutation
- R(k);XS(I)
- Try
- R(H);N_SPINS(D),P_PINB(f),XQ(g)
- Threat
- DUALS(2)
- Vars
- R(j);N_GUARD,XQ(F)::S(I)
- S(d);N_GUARD::QAR1(F),XS(d)
- Refutation
- P(i);N_SPINB(f)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(g);N_PINS(D),P_SPINB(f),XQ(F)::S(D),XQ(g)
- B(f);N_GUARD,P_SPINQ(g)::QAB1(F),XB(f)
- B(f);N_GUARD,N_PINS(D),P_SPINQ(g)::QAB1(F)
- B(f);P_SPINQ(g),S_CUTR(j)::S(I)
- B(f);P_SPINQ(g),S_CUTR(k)::S(I)
- Refutation
- Q(g);CHECK,P_SPINB(f),XS(D)
- Try
- Actual
- B(C);
- Threat
- R1(A)
- Vars
- Q(g);CHECK,N_PINS(D),P_SPINB(f)::S(D),XQ(g)
- Q(g);CHECK,OGATE,P_SPINB(f),XS(D)::QAB(F),XQ(g)
- S(d);OGATE,XB(C)::QAR1(F),XS(d)
- P(i);::R1(A),XP(i)
- Q(g);N_PINS(D),P_PINR(A),P_SPINB(f)::QAB1(F)
- Q(g);N_PINS(D),P_SPINB(f)::S(D),XQ(g)
- Q(g);P_SPINB(f)::QAB1(F)
- B(f);N_GUARD,P_SPINQ(g)::QAB1(F)
- B(f);N_GUARD,P_SPINQ(g)::QAB1(F),XB(f)
- B(f);N_PINS(D),P_SPINQ(g)::S(D)
- B(f);P_SPINQ(g),S_CUTR(j)::S(I)
- B(f);P_SPINQ(g),S_CUTR(k)::S(I)
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).