MESON Chess Problem Database
Problem Display
PID: 59939 (8/2bN2nB/K4Qr1/R2N2pq/1P2knP1/R7/4r3/6B1 w - - 0 1)
van der Ven, AMA
Comm., Brisbane Courier, 1925
#2
10 + 8
| 56 | The Problemist | 2005 |
SOLUTION
- SOUND
- Sets
- 1...Ra2
- 2.Re3#
- 1...Rb2
- 2.Re3#
- 1...Rc2
- 2.Re3#
- 1...Rd2
- 2.Re3#
- 1...Rf2
- 2.Re3#
- 1...Rg2
- 2.Re3#
- 1...Rh2
- 2.Re3#
- 1...Re3
- 2.Rxe3#
- 1...Bb6
- 2.Qe5#
- 1...Bd6
- 2.Qd4#
- 1...Sd3
- 2.Sc3#
- 1...Sxd5
- 2.Sc5#
- 1...Sfe6
- 2.Qf3#
- 1...Sge6
- 2.Qf5#
- 1...Ra2
- Tries
- 1.Kb7?
- threat
- 2.Qd4#
- 1...Re3
- 2.Rxe3#
- 1...Rd2
- 2.Re3#
- 1...Rf2
- 2.Re3#
- 1...Be5
- 2.Qxe5#
- 1...Bb6
- 2.Qe5#
- 1...Sd3
- 2.Sc3#
- 1...Sfe6
- 2.Qf3#
- 1...Sf5
- 2.Qxf5#
- 1...Sge6
- 2.Qf5#
- 1...Qxg4!
- threat
- 1.S5b6?
- threat
- 2.Sc5#
- 2.Qd4#
- 1...Bxb6
- 2.Re5#
- 2.Qe5#
- 1...Re3
- 2.Rxe3#
- 1...Rc2
- 2.Re3#
- 2.Qd4#
- 1...Rd2
- 2.Sc5#
- 2.Re3#
- 1...Rf2
- 2.Sc5#
- 1...Be5
- 2.Sc5#
- 2.Rxe5#
- 2.Qxe5#
- 1...Bd6
- 2.Qd4#
- 1...Sfe6
- 2.Qf3#
- 1...Sf5
- 2.Sc5#
- 2.Qxf5#
- 1...Sge6
- 2.Qf5#
- 1...Sd3!
- threat
- 1.Sxc7?
- threat
- 2.Sc5#
- 2.Re5#
- 1...Re3
- 2.Rxe3#
- 1...Rc2
- 2.Re3#
- 2.Re5#
- 1...Rf2
- 2.Sc5#
- 1...Sd5
- 2.Sc5#
- 1...Sfe6
- 2.Re5#
- 2.Qe5#
- 2.Qf3#
- 1...Sge6
- 2.Re5#
- 2.Qe5#
- 2.Qf5#
- 1...Sd3!
- threat
- 1.Se7?
- threat
- 2.Sc5#
- 1...Re3
- 2.Rxe3#
- 1...Rc2
- 2.Re3#
- 1...Bb6
- 2.Re5#
- 2.Qe5#
- 1...Bd6
- 2.Qd4#
- 1...Sfe6
- 2.Qf3#
- 1...Sge6
- 2.Qf5#
- 1...Sd3!
- threat
- 1.Bb6?
- threat
- 2.Qd4#
- 1...Bxb6
- 2.Qe5#
- 1...Re3
- 2.Rxe3#
- 1...Sd3
- 2.Sc3#
- 1...Rd2
- 2.Re3#
- 1...Be5
- 2.Qxe5#
- 1...Sfe6
- 2.Qf3#
- 1...Sf5
- 2.Qxf5#
- 1...Sge6
- 2.Qf5#
- 1...Qxg4!
- threat
- 1.Bxg6+?
- 1...Sxg6
- 2.Qd4#
- 2.Qf3#
- 1...Sf5
- 2.Bxf5#
- 2.Qd4#
- 2.Qxf5#
- 1...Qxg6!
- 1...Sxg6
- 1.Rg3?
- threat
- 2.Sc3#
- 1...Sxd5
- 2.Sc5#
- 1...Re3
- 2.Rxe3#
- 1...Rc2
- 2.Re3#
- 1...Be5!
- threat
- 1.Qe6+?
- 1...Be5
- 2.S5f6#
- 2.Sc5#
- 2.S7f6#
- 1...Sgxe6
- 2.S5f6#
- 1...Sfxe6!
- 1...Be5
- 1.Qxg6+?
- 1...Qxg6+
- 2.S5f6#
- 1...Sf5
- 2.S5f6#
- 2.Qxf5#
- 1...Sxg6!
- 1...Qxg6+
- 1.Kb7?
- Keys
- 1.Bg8!
- threat
- 2.Sc5#
- 1...Rxf6+
- 2.S5xf6#
- 1...Re3
- 2.Rxe3#
- 1...Sd3
- 2.Sc3#
- 1...Rc2
- 2.Re3#
- 1...Bb6
- 2.Qe5#
- 1...Bd6
- 2.Qd4#
- 1...Sfe6
- 2.Qf3#
- 1...Sge6
- 2.Qf5#
- threat
- 1.Bg8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 7
- Sets
- R(a);N_GUARD::R1(B)
- R(a);N_GUARD::R1(B),XR(a)
- B(g);N_PINQ(H)::QAR1(H)
- S(c);SBLOCK::S(F)
- S(c);SBLOCK,XS(F)::S(I)
- S(c);N_PINQ(H)::QAB1(H)
- S(h);N_PINQ(H)::QAB1(H)
- Tries
- Try
- K(G);N_SPINQ(H),S_FLIGHT
- Threat
- QAR1(H)
- Vars
- R(a);N_GUARD::R1(B),XR(a)
- R(a);N_GUARD::R1(B)
- B(g);N_GUARD::QAR1(H),XB(g)
- B(g);N_GUARD::QAR1(H)
- S(c);SBLOCK::S(F)
- S(c);OGATE::QAB1(H)
- S(h);N_GUARD,N_SPINR(f)::QAB1(H),XS(h)
- S(h);N_GUARD::QAB1(H)
- Refutation
- Q(e);XP(D)
- Try
- S(F);N_SPINQ(H)
- Threat
- DUALS(2)
- Vars
- R(a);N_GUARD::R1(B),XR(a)
- R(a);::S(I)
- B(g);::QAR1(H)
- S(c);OGATE::QAB1(H)
- S(h);N_GUARD::QAB1(H)
- Refutation
- S(c);
- Try
- S(F);XB(g)
- Threat
- DUALS(2)
- Vars
- R(a);N_GUARD::R1(B),XR(a)
- R(a);::S(I)
- S(c);::S(I)
- Refutation
- S(c);
- Try
- S(F);
- Threat
- S(I)
- Vars
- R(a);N_GUARD::R1(B),XR(a)
- R(a);N_GUARD::R1(B)
- B(g);N_PINQ(H)::QAR1(H)
- S(c);N_PINQ(H)::QAB1(H)
- S(h);N_PINQ(H)::QAB1(H)
- Refutation
- S(c);
- Try
- B(A);N_SPINQ(H)
- Threat
- QAR1(H)
- Vars
- B(g);N_GUARD,XB(A)::QAR1(H)
- R(a);N_GUARD::R1(B),XR(a)
- S(c);SBLOCK::S(F)
- R(a);N_GUARD::R1(B)
- B(g);N_GUARD::QAR1(H),XB(g)
- S(c);OGATE::QAB1(H)
- S(h);N_GUARD,N_SPINR(f)::QAB1(H),XS(h)
- S(h);N_GUARD::QAB1(H)
- Refutation
- Q(e);XP(D)
- Try
- B(J);CHECK,N_SPINQ(H),XR(f)
- Refutation
- Q(e);P_PINQ(H),XB(J)
- Try
- R(B);
- Threat
- S(F)
- Vars
- S(c);SBLOCK,XS(F)::S(I)
- R(a);N_GUARD::R1(B),XR(a)
- R(a);N_GUARD::R1(B)
- Refutation
- B(g);
- Try
- Q(H);CHECK
- Vars
- S(h);XQ(H)::S(F)
- Refutation
- S(c);XQ(H)
- Try
- Q(H);CHECK,N_SPINQ(H),XR(f)
- Vars
- Q(e);CHECK,P_SPINQ(e),XQ(H)::S(F)
- Refutation
- S(c);P_SPINS(c),XQ(H)
- Try
- Actual
- B(J);N_PINR(f)
- Threat
- S(I)
- Vars
- R(f);CHECK,XQ(H)::S(F),XR(f)
- R(a);N_GUARD::R1(B),XR(a)
- S(c);SBLOCK::S(F)
- R(a);N_GUARD::R1(B)
- B(g);N_PINQ(H)::QAR1(H)
- S(c);N_PINQ(H)::QAB1(H)
- S(h);N_PINQ(H)::QAB1(H)
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).