MESON Chess Problem Database
Problem Display
PID: 83717 (4R3/B1pp1p2/1n4B1/KQ4rR/2Nk1p2/NP4p1/1P3r2/3b4 w - - 0 1)
Ellerman, Arnoldo
Good Companions, 1920
#2
10 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rg4
- 2.Rd5#
- 2.Qxd7#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Rxb5+
- 2.Sxb5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Re5
- 2.Qxe5#
- 1...Rxg6
- 2.Rd5#
- 2.Qd5#
- 1...Be2
- 2.Sc2#
- 1...Rg4
- Tries
- 1.Rxg5?
- threat
- 2.Rd5#
- 2.Qxd7#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Rxb2
- 2.Qe5#
- 1...fxg6
- 2.Rd5#
- 2.Qxd7#
- 2.Qd5#
- 1...Re2
- 2.Rd5#
- 2.Qxd7#
- 2.Qc5#
- 2.Qd5#
- 1...Bf3
- 2.Qc5#
- 2.Qe5#
- 1...Bg4
- 2.Rd5#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...c5
- 2.Qxc5#
- 1...c6
- 2.Qc5#
- 2.Qe5#
- 1...d5
- 2.Rxd5#
- 2.Qxd5#
- 1...d6
- 2.Rd5#
- 2.Qd5#
- 1...f6
- 2.Rd5#
- 2.Qxd7#
- 2.Qc5#
- 2.Qd5#
- 1...f5!
- threat
- 1.Re5?
- threat
- 2.Qxd7#
- 2.Qc5#
- 2.Qd5#
- 1...Rxe5
- 2.Qxe5#
- 1...Rxg6
- 2.Qd5#
- 1...fxg6
- 2.Qxd7#
- 2.Qd5#
- 1...Rf5
- 2.Qxd7#
- 2.Qd5#
- 1...f5
- 2.Qxd7#
- 2.Qd5#
- 1...Bf3
- 2.Qc5#
- 1...Bg4
- 2.Qc5#
- 2.Qd5#
- 1...c5
- 2.Qxc5#
- 1...c6
- 2.Qc5#
- 1...d5
- 2.Qxd5#
- 1...d6
- 2.Qd5#
- 1...Rxb2!
- threat
- 1.Qxg5?
- threat
- 2.Sb5#
- 2.Qf6#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Rxb2
- 2.Sb5#
- 2.Qf6#
- 2.Qe5#
- 1...Bxb3
- 2.Qf6#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Bxh5
- 2.Sb5#
- 2.Qe5#
- 1...fxg6
- 2.Qd5#
- 1...d5
- 2.Qxd5#
- 1...Re2
- 2.Sb5#
- 2.Qc5#
- 2.Qd5#
- 1...Bf3
- 2.Sb5#
- 2.Qf6#
- 2.Qc5#
- 2.Qe5#
- 1...c5
- 2.Sb5#
- 2.Qf6#
- 2.Qxc5#
- 2.Qe5#
- 1...c6
- 2.Qf6#
- 2.Qc5#
- 2.Qe5#
- 1...d6
- 2.Sb5#
- 2.Qf6#
- 2.Qd5#
- 1...f6
- 2.Sb5#
- 2.Qxf6#
- 2.Qc5#
- 2.Qd5#
- 1...f5!
- threat
- 1.Rxg5?
- Keys
- 1.Sd2!
- threat
- 2.Re4#
- 1...Rxb5+
- 2.Sxb5#
- 1...Re5
- 2.Qxe5#
- 1...c5
- 2.Qd3#
- 1...Re2
- 2.Sf3#
- 1...Bc2
- 2.Sxc2#
- 1...Bf3
- 2.Sc2#
- 1...d5
- 2.Qb4#
- 1...f5
- 2.Qc4#
- threat
- 1.Sd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 2
- Sets
- R(f);CHECK,XQ(F)::S(B),XR(f)
- R(f);N_GUARD,N_SPINS(g)::QAB1(F),XR(f)
- R(f);N_GUARD::QAB1(F),XR(f)
- B(a);N_GUARD,S_CUTR(b)::S(B)
- Tries
- Try
- R(G);N_SPINQ(F),XR(f)
- Threat
- DUALS(5)
- Vars
- R(b);XP(A)::QAB1(F)
- P(h);N_SPINS(g)::QAB1(F),XP(h)
- Refutation
- P(j);
- Try
- R(J);N_SPINQ(F)
- Threat
- DUALS(3)
- Vars
- R(f);OGATE,P_PINQ(F),XR(J)::QAB1(F),XR(f)
- R(f);XB(H)::QAR1(F)
- B(a);::QAB1(F)
- P(h);N_SPINS(g)::QAB1(F),XP(h)
- P(h);::QAB1(F)
- P(i);::QAR1(F),XP(i)
- P(i);::QAR1(F)
- Refutation
- R(b);XP(A)
- Try
- Q(F);N_SPINQ(F),XR(f)
- Threat
- DUALS(5)
- Vars
- P(j);XB(H)::QAR1(F)
- P(i);::QAR1(F),XP(i)
- Refutation
- P(j);
- Try
- Actual
- S(D);
- Threat
- R1(J)
- Vars
- R(f);CHECK,XQ(F)::S(B),XR(f)
- R(f);N_GUARD::QAB1(F),XR(f)
- P(h);N_PINQ(F),N_SPINS(g),SBLOCK::QAR1(F)
- R(b);N_GUARD,S_CUTB(a)::S(D)
- B(a);N_GUARD::S(B),XB(a)
- B(a);N_GUARD::S(B)
- P(i);N_PINQ(F),SBLOCK::QAR2(F)
- P(j);N_PINQ(F)::QAR1(F)
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).