MESON Chess Problem Database
Problem Display
PID: 148338 (2Q5/b2pprq1/6n1/n3N1R1/1PPkB2r/2p2p1b/2P2K2/2B1R3 w - - 0 1)
Keller, Michael
2nd Prize, Neue Zurcher Zeitung, 2006-2007
#2
10 + 12
| 23 | Die Schwalbe | 2012 |
| 56 | The Problemist | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Rxe4
- 2.Rd1#
- 1...Rg4
- 2.Qxd7#
- 1...Bf1
- 2.Qxd7#
- 1...Bg2
- 2.Qxd7#
- 1...Bf5
- 2.Sxf3#
- 1...Bc5
- 2.Qxc5#
- 1...Bb8
- 2.Qc5#
- 1...Sxc4
- 2.Qxc4#
- 1...Sf4
- 2.Sxf3#
- 1...Rxe4
- Tries
- 1.Bd3?
- threat
- 2.Be3#
- 1...Sxc4
- 2.Qxc4#
- 1...Re4
- 2.Rxe4#
- 1...Rf5
- 2.Qxd7#
- 1...Bf5
- 2.Sxf3#
- 1...Qxe5!
- threat
- 1.Bxf3?
- threat
- 2.Be3#
- 2.Rd1#
- 1...Rxf3+
- 2.Sxf3#
- 1...Qxe5
- 2.Rd1#
- 1...Sxc4
- 2.Qxc4#
- 1...Sxe5
- 2.Be3#
- 1...Re4
- 2.Rd1#
- 2.Rxe4#
- 1...Rf5
- 2.Qxd7#
- 1...Bf1
- 2.Be3#
- 2.Qxd7#
- 1...Sb3
- 2.Be3#
- 1...Sf4
- 2.Be3#
- 2.Re4#
- 1...Bf5!
- threat
- 1.Bd5?
- threat
- 2.Be3#
- 2.Rd1#
- 1...Qxe5
- 2.Rd1#
- 1...Sxc4
- 2.Qxc4#
- 1...Sxe5
- 2.Be3#
- 1...Re4
- 2.Rd1#
- 2.Rxe4#
- 1...Bf1
- 2.Be3#
- 1...Bf5
- 2.Sxf3#
- 1...Sb3
- 2.Be3#
- 1...Sf4
- 2.Sxf3#
- 2.Be3#
- 2.Re4#
- 1...Rf5!
- threat
- 1.Bxg6?
- threat
- 2.Be3#
- 2.Rd1#
- 1...Qxe5
- 2.Rd1#
- 1...Sxc4
- 2.Qxc4#
- 1...Re4
- 2.Rd1#
- 2.Rxe4#
- 1...Rf5
- 2.Qxd7#
- 1...Bf1
- 2.Be3#
- 2.Qxd7#
- 1...Bf5
- 2.Sxf3#
- 1...Sb3
- 2.Be3#
- 1...Qxg6!
- threat
- 1.Bd3?
- Keys
- 1.Bf5!
- threat
- 2.Sxf3#
- 2.Qxd7#
- 1...Qxe5
- 2.Rd1#
- 1...Rxf5
- 2.Qxd7#
- 1...Bxf5
- 2.Sxf3#
- 1...Sxc4
- 2.Qxc4#
- 1...Sxe5
- 2.Be3#
- 1...Re4
- 2.Sxf3#
- 2.Rxe4#
- 1...Qf6
- 2.Sxf3#
- 1...Rf4
- 2.Qxd7#
- 1...Rf6
- 2.Sxf3#
- 1...Bg2
- 2.Qxd7#
- 1...Bg4
- 2.Re4#
- 2.Qxd7#
- 1...Bc5
- 2.Qxc5#
- 1...Bb8
- 2.Sxf3#
- 2.Qc5#
- 1...Sc6
- 2.Qxd7#
- 1...Sb7
- 2.Sxf3#
- 1...Sf4
- 2.Sxf3#
- 2.Re4#
- 1...Sf8
- 2.Sxf3#
- 1...d5
- 2.Sxf3#
- 1...d6
- 2.Sxf3#
- 1...e6
- 2.Sxf3#
- threat
- 1.Bf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 12
- REMOVED MATES = 5
- Sets
- R(e);SBLOCK,XB(G)::R(B)
- R(e);S_CUTB(c)::QAR(J),XP(i)
- B(c);N_GUARD::QAR(J),XP(i)
- B(c);S_CUTR(k)::S(H),XP(b)
- B(h);N_GUARD::QAB1(J),XB(h)
- B(h);N_GUARD::QAB1(J)
- S(f);OGATE,XP(F)::QAR1(J),XS(f)
- S(g);S_CUTR(k)::S(H),XP(b)
- Tries
- Try
- B(G);
- Threat
- B(A)
- Vars
- S(f);OGATE,XP(F)::QAR1(J),XS(f)
- R(e);N_GUARD::R1(B),XR(e)
- R(k);S_CUTB(c)::QAR(J),XP(i)
- B(c);S_CUTR(k)::S(H),XP(b)
- Refutation
- Q(l);XS(H)
- Try
- B(G);P_SPINB(G),XP(b)
- Threat
- DUALS(2)
- Vars
- R(k);CHECK,XB(G)::S(H),XR(k)
- Q(l);XS(H)::R(B)
- S(f);OGATE,XP(F)::QAR1(J),XS(f)
- S(g);XS(H)::B(A)
- R(k);S_CUTB(c)::QAR(J),XP(i)
- S(f);::B(A)
- Refutation
- B(c);N_PINB(G)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- Q(l);XS(H)::R(B)
- S(f);OGATE,XP(F)::QAR1(J),XS(f)
- S(g);XS(H)::B(A)
- B(c);::B(A)
- B(c);S_CUTR(k)::S(H),XP(b)
- S(f);::B(A)
- Refutation
- R(k);
- Try
- B(G);XS(g)
- Threat
- DUALS(2)
- Vars
- Q(l);XS(H)::R(B)
- S(f);OGATE,XP(F)::QAR1(J),XS(f)
- R(k);S_CUTB(c)::QAR(J),XP(i)
- B(c);S_CUTR(k)::S(H),XP(b)
- S(f);::B(A)
- Refutation
- Q(l);XB(G)
- Try
- Actual
- B(G);
- Threat
- DUALS(2)
- Vars
- Q(l);SBLOCK,XS(H)::R(B)
- R(k);XB(G)::QAR(J),XP(i)
- B(c);XB(G)::S(H),XP(b)
- S(f);OGATE,XP(F)::QAR1(J),XS(f)
- S(g);SBLOCK,XS(H)::B(A)
- Q(l);::S(H),XP(b)
- R(e);::QAR(J),XP(i)
- R(k);::S(H),XP(b)
- B(c);::QAR(J),XP(i)
- B(h);N_GUARD::QAB1(J),XB(h)
- S(f);::QAR(J),XP(i)
- S(f);::S(H),XP(b)
- S(g);::S(H),XP(b)
- P(i);::S(H),XP(b)
- P(j);::S(H),XP(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).