MESON Chess Problem Database
Problem Display
PID: 195168 (4R1q1/3b2p1/8/b2p2B1/4BN1N/1Qp1k2r/K1R5/7n w - - 0 1)
Ellerman, Arnoldo
Densmore MT (Pittsburgh Gazette-Times), 1918
#2
8 + 9
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Bb6
- 2.Qxc3#
- 1...Bc7
- 2.Qxc3#
- 1...Bd8
- 2.Qxc3#
- 1...Ba4
- 2.Sf5#
- 1...Bb5
- 2.Sf5#
- 1...Bf5
- 2.Sxf5#
- 1...Bc6
- 2.Sf5#
- 1...Sf2
- 2.Se2#
- 1...d4
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sd5#
- 2.Sh5#
- 2.Sfg6#
- 2.Shg2#
- 2.Re2#
- 1...Bb6
- Tries
- 1.Bxd5+?
- 1...Kd4
- 2.Qc4#
- 1...Qe6
- 2.Sf5#
- 1...Be6
- 2.Sf5#
- 1...Bxe8
- 2.Sf5#
- 1...Qxe8!
- 1...Kd4
- 1.Bf5+?
- 1...Qe6
- 2.Sxe6#
- 1...Qxe8
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Bxe8
- 2.Se6#
- 1...Kd4!
- 1...Qe6
- 1.Bg6+?
- 1...Qe6
- 2.Sxe6#
- 1...Qxe8
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Bxe8
- 2.Se6#
- 1...Kd4!
- 1...Qe6
- 1.Bh7+?
- 1...Qe6
- 2.Sxe6#
- 1...Qxe8
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Bxe8
- 2.Se6#
- 1...Kd4!
- 1...Qe6
- 1.Qc4?
- threat
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Shg2#
- 2.Re2#
- 2.Qd3#
- 1...Rxh4
- 2.Sg2#
- 2.Sxd5#
- 2.Re2#
- 2.Qd3#
- 1...dxe4
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sd5#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Re2#
- 2.Rxe4#
- 1...Qe6
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sxe6#
- 2.Sfg6#
- 2.Shg2#
- 2.Re2#
- 2.Qd3#
- 1...Qf7
- 2.Sfg2#
- 2.Sxd5#
- 2.Shg2#
- 2.Re2#
- 2.Qd3#
- 1...Qf8
- 2.Sfg2#
- 2.Sxd5#
- 2.Shg2#
- 2.Re2#
- 2.Qd3#
- 1...Rh2
- 2.Sfg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Qd3#
- 1...Rf3
- 2.Sfg2#
- 2.Sxd5#
- 2.Shg2#
- 2.Re2#
- 2.Qd3#
- 1...Rg3
- 2.Sfg2#
- 2.Sxd5#
- 2.Re2#
- 2.Qd3#
- 1...Bc7
- 2.Sfg2#
- 2.Sxd5#
- 2.Shg2#
- 2.Re2#
- 2.Qd3#
- 2.Qxc3#
- 1...Bd8
- 2.Sfg2#
- 2.Sxd5#
- 2.Shg2#
- 2.Re2#
- 2.Qd3#
- 2.Qxc3#
- 1...Bg4
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Shg2#
- 2.Qd3#
- 1...Bb5
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Shg2#
- 2.Sf5#
- 2.Re2#
- 1...Be6
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sxe6#
- 2.Sfg6#
- 2.Shg2#
- 2.Re2#
- 2.Qd3#
- 1...Sf2
- 2.Se2#
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Shg2#
- 2.Re2#
- 1...Sg3
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Shg2#
- 2.Qd3#
- 1...d4
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sd5#
- 2.Sh5#
- 2.Sfg6#
- 2.Shg2#
- 2.Re2#
- 1...g6
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Se6#
- 2.Sfxg6#
- 2.Shg2#
- 2.Re2#
- 2.Qd3#
- 1...dxc4!
- threat
- 1.Qxd5?
- threat
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Shg2#
- 2.Re2#
- 1...Rxh4
- 2.Sg2#
- 2.Re2#
- 1...Qe6
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Sxe6#
- 2.Sfg6#
- 2.Shg2#
- 2.Re2#
- 1...Qf7
- 2.Sfg2#
- 2.Shg2#
- 2.Re2#
- 1...Qf8
- 2.Sfg2#
- 2.Shg2#
- 2.Re2#
- 2.Qd3#
- 1...Rh2
- 2.Sfg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 1...Rf3
- 2.Sfg2#
- 2.Shg2#
- 2.Re2#
- 1...Rg3
- 2.Sfg2#
- 2.Re2#
- 1...Bc7
- 2.Sfg2#
- 2.Shg2#
- 2.Re2#
- 1...Bd8
- 2.Sfg2#
- 2.Shg2#
- 2.Re2#
- 1...Bg4
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Shg2#
- 1...Bb5
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Shg2#
- 2.Sf5#
- 1...Be6
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Sxe6#
- 2.Sfg6#
- 2.Shg2#
- 2.Re2#
- 1...Sg3
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Se6#
- 2.Sfg6#
- 2.Shg2#
- 1...g6
- 2.Sfg2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Se6#
- 2.Sfxg6#
- 2.Shg2#
- 2.Re2#
- 1...Qxd5+!
- threat
- 1.Qb6+?
- 1...d4+
- 2.Sd5#
- 1...Bxb6!
- 1...d4+
- 1.Bxd5+?
- Keys
- 1.Qb5!
- threat
- 2.Qd3#
- 1...dxe4+
- 2.Se6#
- 1...d4+
- 2.Sd5#
- 1...Kd4
- 2.Se2#
- 1...Bxb5
- 2.Sf5#
- 1...Sf2
- 2.Se2#
- threat
- 1.Qb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- B(e);N_GUARD::QAR2(C),XP(b)
- B(g);N_GUARD::S(F)
- B(g);N_GUARD::S(F),XB(g)
- S(a);SBLOCK::B(G)+S(E)
- Tries
- Try
- B(D);CHECK,XP(f)
- Vars
- K(c);N_SPINP(b),S_FLIGHT::QAR1(C)
- Q(i);P_SPINQ(i)::S(F)
- B(g);P_SPINB(g)::S(F)
- B(g);XR(H)::S(F)
- Refutation
- Q(i);XR(H)
- Try
- B(D);CHECK
- Vars
- Q(i);P_SPINQ(i)::B(G)+S(E),XQ(i)
- Q(i);XR(H)::B(G)+S(E)
- B(g);P_SPINB(g)::B(G)+S(E),XB(g)
- B(g);XR(H)::B(G)+S(E)
- Refutation
- K(c);N_SPINP(b),S_FLIGHT
- Try
- B(D);CHECK
- Vars
- Q(i);P_SPINQ(i)::B(G)+S(E),XQ(i)
- Q(i);XR(H)::B(G)+S(E)
- B(g);P_SPINB(g)::B(G)+S(E),XB(g)
- B(g);XR(H)::B(G)+S(E)
- Refutation
- K(c);N_SPINP(b),S_FLIGHT
- Try
- B(D);CHECK
- Vars
- Q(i);P_SPINQ(i)::B(G)+S(E),XQ(i)
- Q(i);XR(H)::B(G)+S(E)
- B(g);P_SPINB(g)::B(G)+S(E),XB(g)
- B(g);XR(H)::B(G)+S(E)
- Refutation
- K(c);N_SPINP(b),S_FLIGHT
- Try
- Q(C);N_PINP(b)
- Threat
- DUALS(10)
- Refutation
- P(f);XQ(C)
- Try
- Q(C);N_PINP(b),P_SPINQ(C),XP(f)
- Threat
- DUALS(8)
- Refutation
- Q(i);CHECK,XQ(C)
- Try
- Q(C);CHECK,N_PINP(b)
- Vars
- P(f);CHECK,P_SPINP(f)::B(G)+S(E),DCHECK
- Refutation
- B(e);XQ(C)
- Try
- Actual
- Q(C);N_PINP(b)
- Threat
- QAR1(C)
- Vars
- P(f);CHECK,P_SPINP(f),SBLOCK,XB(D)::B(G)+S(E)
- P(f);CHECK,SBLOCK::B(G)+S(E),DCHECK
- K(c);S_FLIGHT::S(E)
- B(g);N_GUARD,XQ(C)::S(F)
- S(a);SBLOCK::B(G)+S(E)
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).