MESON Chess Problem Database
Problem Display
PID: 76503 (1N2Q2b/5r2/1p1p4/1PknnR1q/r2R2p1/4P3/p1N5/K4B2 w - - 0 1)
Holladay, Edgar Dinwiddie
HM., British Chess Magazine, 1947
#2
9 + 11
| 6232 | Holladay Chess Problems | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Rb4
- 2.Sa6#
- 1...Rc4
- 2.Sa6#
- 1...Rxd4
- 2.Sa6#
- 2.exd4#
- 1...Ra6
- 2.Sxa6#
- 1...Sc3
- 2.Qc6#
- 1...Sxe3
- 2.Qc6#
- 1...Sf4
- 2.Qc6#
- 1...Sf6
- 2.Qc6#
- 1...Sc7
- 2.Qc6#
- 1...Se7
- 2.Sd7#
- 1...Sd3
- 2.Qc6#
- 1...Sf3
- 2.Qc6#
- 1...Sc4
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sd7
- 2.Qc8#
- 1...Rb4
- Tries
- 1.Sd7+?
- 1...Sxd7
- 2.Qc8#
- 1...Rxd7!
- 1...Sxd7
- 1.Rc4+?
- 1...Rxc4
- 2.Sa6#
- 1...Sxc4+!
- 1...Rxc4
- 1.Rxe5?
- threat
- 2.Rdxd5#
- 2.Qc6#
- 1...Qxe5
- 2.Qc6#
- 1...Rxd4
- 2.Sa6#
- 2.Qc6#
- 2.exd4#
- 1...Bxe5
- 2.Qc6#
- 1...dxe5
- 2.Qc6#
- 1...Qh1
- 2.Qc6#
- 1...Rc7
- 2.Rdxd5#
- 1...Rd7
- 2.Sxd7#
- 2.Rdxd5#
- 1...Rxf1+!
- threat
- 1.Qe6?
- threat
- 2.Rxd5#
- 2.Qxd5#
- 1...Rxd4
- 2.Sa6#
- 2.exd4#
- 1...Sxe3
- 2.Qxd6#
- 1...Sd3
- 2.Qxd5#
- 1...Sc4
- 2.Qxd5#
- 1...Sc3
- 2.Qxd6#
- 1...Sb4
- 2.Qc4#
- 2.Qxd6#
- 1...Sf4
- 2.Qxd6#
- 1...Sf6
- 2.Qxd6#
- 1...Sc7
- 2.Qxd6#
- 1...Se7
- 2.Sd7#
- 2.Qxd6#
- 1...Sf3
- 2.Qxd5#
- 1...Sc6
- 2.Qxd5#
- 1...Sg6
- 2.Qxd5#
- 1...Sd7
- 2.Qxd5#
- 1...Qh1!
- threat
- 1.Sd7+?
- Keys
- 1.e4!
- threat
- 2.Rxd5#
- 1...Rxd4
- 2.Sa6#
- 1...Sc3
- 2.Qc6#
- 1...Se3
- 2.Qc6#
- 1...Sb4
- 2.Rc4#
- 1...Sf4
- 2.Qc6#
- 1...Sf6
- 2.Qc6#
- 1...Sc7
- 2.Qc6#
- 1...Se7
- 2.Sd7#
- 1...Sd3
- 2.Qc6#
- 1...Sf3
- 2.Qc6#
- 1...Sc4
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sd7
- 2.Qc8#
- threat
- 1.e4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- R(b);N_GUARD::S(H)
- R(b);N_GUARD::S(H),XR(b)
- S(e);P_SPINS(f)::QAR1(I)
- S(e);P_SPINS(f),XP(D)::QAR1(I)
- S(e);P_SPINS(f),S_CUTR(j)::S(H)
- S(f);N_GUARD,P_PINR(E),P_SPINS(e)::QAR1(I)
- S(f);N_GUARD,P_PINR(E),P_SPINS(e)::QAR1(I),XS(f)
- S(f);N_GUARD,P_PINR(E),P_SPINS(e),S_CUTR(j)::QAR(I)
- Tries
- Try
- S(H);CHECK
- Vars
- S(f);P_PINR(E),P_SPINS(e),XS(H)::QAR(I)
- Refutation
- R(j);XS(H)
- Try
- R(E);CHECK
- Vars
- R(b);XR(E)::S(H)
- Refutation
- S(f);CHECK,P_SPINS(e),XR(E)
- Try
- R(G);P_PINS(e),XS(f)
- Threat
- DUALS(2)
- Vars
- Q(g);N_SPINS(e),P_PINR(E),XR(G)::QAR1(I)
- B(k);N_SPINS(e),P_PINR(E),XR(G)::QAR1(I)
- P(i);N_SPINS(e),XR(G)::QAR1(I)
- Q(g);P_PINB(B)::QAR1(I)
- R(j);::R1(E),XS(e)
- Refutation
- R(j);CHECK,XB(B)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- S(e);P_SPINS(f),XP(D)::QAB1(I),XP(i)
- S(f);P_PINR(E),P_SPINS(e)::QAR1(I),XS(e)
- S(e);P_SPINS(f)::QAB1(I),XP(i)
- Refutation
- Q(g);P_PINB(B)
- Try
- Actual
- P(D);
- Threat
- R1(E),XS(e)
- Vars
- R(b);N_GUARD,XR(E)::S(H)
- S(e);P_SPINS(f)::QAR1(I)
- S(e);P_SPINS(f),S_CUTR(b)::R1(E)
- S(e);P_SPINS(f),S_CUTR(j)::S(H)
- S(f);N_GUARD,P_PINR(E),P_SPINS(e)::QAR1(I)
- S(f);N_GUARD,P_PINR(E),P_SPINS(e)::QAR1(I),XS(f)
- S(f);N_GUARD,P_PINR(E),P_SPINS(e),S_CUTR(j)::QAR(I)
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).