MESON Chess Problem Database
Problem Display
PID: 100834 (bB1b2nK/1n1q2pN/4N1p1/r4k2/3p2R1/1p2R2P/5r2/2Q5 w - - 0 1)
Anderson, Gerald Frank
Good Companions, 1919
#2
8 + 12
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qa4
- 2.Sxg7#
- 1...Qb5
- 2.Sxd4#
- 2.Sxg7#
- 1...Qc6
- 2.Sxd4#
- 2.Sxg7#
- 1...Qc8
- 2.Sxd4#
- 2.Sxg7#
- 1...Qe8
- 2.Sxd4#
- 2.Sxg7#
- 1...Qd5
- 2.Sxg7#
- 1...Qd6
- 2.Sxg7#
- 1...Qc7
- 2.Sxd4#
- 1...Qe7
- 2.Sxd4#
- 1...Qf7
- 2.Sxd4#
- 1...Rf1
- 2.Qxf1#
- 1...Rfa2
- 2.Rf4#
- 1...Rb2
- 2.Rf4#
- 1...Rc2
- 2.Rf4#
- 1...Rd2
- 2.Rf4#
- 1...Re2
- 2.Rf4#
- 1...Rg2
- 2.Rf4#
- 1...Rh2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Ra1
- 2.Re5#
- 1...Raa2
- 2.Re5#
- 1...Ra3
- 2.Re5#
- 1...Ra4
- 2.Re5#
- 1...Re5
- 2.Rxe5#
- 1...Ra6
- 2.Re5#
- 1...Ra7
- 2.Re5#
- 1...Bg5
- 2.Rxg5#
- 1...Bb6
- 2.Rg5#
- 1...Bc7
- 2.Rg5#
- 1...Be7
- 2.Sxg7#
- 1...Sc5
- 2.Re5#
- 1...Sd6
- 2.Sxd4#
- 1...Sf6
- 2.Rg5#
- 1...Se7
- 2.Sxg7#
- 2.Rg5#
- 1...Qa4
- Tries
- 1.Qd2?
- threat
- 2.Qxf2#
- 2.Qd3#
- 1...Qxe6
- 2.Qxf2#
- 1...Rxd2
- 2.Rf4#
- 1...Re5
- 2.Rxe5#
- 1...g5
- 2.Qd3#
- 1...Qb5
- 2.Sxd4#
- 2.Sxg7#
- 2.Qxf2#
- 1...Qc6
- 2.Sxd4#
- 2.Sxg7#
- 1...Qd5
- 2.Sxg7#
- 1...Qd6
- 2.Sxg7#
- 2.Qd3#
- 1...Qc7
- 2.Sxd4#
- 2.Qd3#
- 1...Rf1
- 2.Qd3#
- 1...Re2
- 2.Rf4#
- 2.Qd3#
- 1...Rg2
- 2.Rf4#
- 2.Qd3#
- 1...Rh2
- 2.Rf4#
- 2.Qd3#
- 1...Rf3
- 2.Qd3#
- 1...Rf4
- 2.Rxf4#
- 1...Ra2
- 2.Re5#
- 2.Qd3#
- 1...Bh4
- 2.Qd3#
- 1...Bg5
- 2.Rxg5#
- 2.Qd3#
- 1...Bc7
- 2.Rg5#
- 2.Qd3#
- 1...Sc5
- 2.Re5#
- 1...Sd6
- 2.Sxd4#
- 1...Sf6
- 2.Rg5#
- 2.Qxf2#
- 1...d3
- 2.Qxf2#
- 1...dxe3!
- threat
- 1.Qb1+?
- 1...Rc2
- 2.Rf4#
- 1...d3!
- 1...Rc2
- 1.Qh1?
- threat
- 2.Qe4#
- 1...Re5
- 2.Rxe5#
- 1...Qc6
- 2.Sxd4#
- 2.Sxg7#
- 1...Qd5
- 2.Sxg7#
- 1...Rg2
- 2.Rf4#
- 1...Rf3
- 2.Qxf3#
- 1...Rf4
- 2.Rxf4#
- 1...Sc5
- 2.Re5#
- 1...Sd6
- 2.Sxd4#
- 1...Sf6
- 2.Rg5#
- 1...Qxe6!
- threat
- 1.Qc2+?
- 1...Rxc2
- 2.Rf4#
- 1...d3
- 2.Qxf2#
- 1...bxc2!
- 1...Rxc2
- 1.Qc5+?
- 1...Qd5
- 2.Sxd4#
- 2.Sxg7#
- 1...Sxc5
- 2.Re5#
- 1...Rxc5!
- 1...Qd5
- 1.Qc6?
- threat
- 2.Qe4#
- 1...Qxc6
- 2.Sxd4#
- 2.Sxg7#
- 1...Qxe6
- 2.Qxe6#
- 1...Qd5
- 2.Sxg7#
- 1...Rf4
- 2.Rxf4#
- 1...Re5
- 2.Rxe5#
- 1...Sc5
- 2.Re5#
- 1...Sd6
- 2.Sxd4#
- 1...Sf6
- 2.Rg5#
- 1...Rd5!
- threat
- 1.Qd2?
- Keys
- 1.Qc4!
- threat
- 2.Qd3#
- 1...Qxe6
- 2.Qxe6#
- 1...dxe3
- 2.Qe4#
- 1...Qb5
- 2.Sxd4#
- 2.Sxg7#
- 1...Qc6
- 2.Sxd4#
- 2.Sxg7#
- 1...Qd5
- 2.Sxg7#
- 1...Rd2
- 2.Rf3#
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Re5
- 2.Rxe5#
- 1...Sc5
- 2.Re5#
- 1...Sd6
- 2.Sxd4#
- 1...Sf6
- 2.Rg5#
- 1...d3
- 2.Qe4#
- threat
- 1.Qc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 23
- Sets
- Q(h);N_GUARD::S(E),XP(i)
- Q(h);N_GUARD::S(E),XP(c)
- R(a);OGATEB::QAR(A),XR(a)
- R(a);N_GUARD::R1(D)
- R(a);N_GUARD::R1(D),XR(a)
- R(d);N_GUARD::R1(B)
- R(d);N_GUARD::R1(B),XR(d)
- B(k);N_GUARD::R1(D),XB(k)
- B(k);N_GUARD::R1(D)
- B(k);S_CUTQ(h)::S(E),XP(i)
- S(g);S_CUTR(d)::R1(B)
- S(g);S_CUTQ(h)::S(E),XP(c)
- S(l);S_CUTB(k)::R1(D)
- Tries
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(h);XS(E)::QAR(A),XR(a)
- R(a);N_GUARD,XQ(A)::R1(D)
- R(d);N_GUARD::R1(B),XR(d)
- P(f);::QAB(A)
- Q(h);N_GUARD::S(E),XP(i)
- R(a);::QAB(A)
- R(a);N_GUARD::R1(D),XR(a)
- B(k);::QAB(A)
- S(g);S_CUTR(d)::R1(B)
- S(g);S_CUTQ(h)::S(E),XP(c)
- P(c);::QAR(A),XR(a)
- Refutation
- P(c);XR(B)
- Try
- Q(A);CHECK
- Vars
- R(a);P_SPINR(a)::R1(D)
- Refutation
- P(c);P_SPINP(c)
- Try
- Q(A);
- Threat
- QAB1(A)
- Vars
- R(d);N_GUARD::R1(B),XR(d)
- Q(h);N_GUARD::S(E),XP(i)
- R(a);N_GUARD::R1(D)
- R(a);N_GUARD::QAR2(A),XR(a)
- R(a);N_GUARD::R1(D),XR(a)
- S(g);S_CUTR(d)::R1(B)
- S(g);S_CUTQ(h)::S(E),XP(c)
- S(l);S_CUTB(k)::R1(D)
- Refutation
- Q(h);XS(E)
- Try
- Q(A);CHECK
- Vars
- R(a);XQ(A)::R1(D)
- P(c);P_SPINP(c)::QAR(A),XR(a)
- Refutation
- P(b);XQ(A)
- Try
- Q(A);CHECK
- Vars
- S(g);XQ(A)::R1(B)
- Refutation
- R(d);XQ(A)
- Try
- Q(A);
- Threat
- QAB1(A)
- Vars
- Q(h);OGATE,XS(E)::QAB1(A),XQ(h)
- Q(h);N_GUARD::S(E),XP(i)
- R(a);N_GUARD::R1(D),XR(a)
- R(d);N_GUARD::R1(B),XR(d)
- S(g);S_CUTR(d)::R1(B)
- S(g);S_CUTQ(h)::S(E),XP(c)
- S(l);S_CUTB(k)::R1(D)
- Refutation
- R(d);
- Try
- Actual
- Q(A);
- Threat
- QAB(A)
- Vars
- Q(h);OGATE,XS(E)::QAB1(A),XQ(h)
- P(c);OGATE,XR(B)::QAB1(A)
- Q(h);N_GUARD::S(E),XP(i)
- R(a);N_GUARD::R1(D),XR(a)
- R(d);N_GUARD::R1(B),XR(d)
- S(g);S_CUTR(d)::R1(B)
- S(g);S_CUTQ(h)::S(E),XP(c)
- S(l);S_CUTB(k)::R1(D)
- P(c);OGATE::QAB1(A)
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).