MESON Chess Problem Database
Problem Display
PID: 207833 (3B2n1/2ppr1p1/Q1bn1kPb/2N3RP/7p/7p/1p2pN1P/1B2K1R1 w - - 0 1)
Stuart Green, G
The Observer, 1954
(First published on Sun Nov 14 1954)
#2
11 + 13
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Bh1
- 2.Rf5#
- 1...Bg2
- 2.Rf5#
- 1...Bf3
- 2.Rf5#
- 1...Ba4
- 2.Sfe4#
- 2.Rf5#
- 1...Be4
- 2.Sfxe4#
- 1...Bb5
- 2.Sfe4#
- 2.Rf5#
- 1...Bd5
- 2.Rf5#
- 1...Bb7
- 2.Rf5#
- 1...Ba8
- 2.Rf5#
- 1...Bxg5
- 2.Sg4#
- 1...Sc4
- 2.Sfe4#
- 2.Rf5#
- 1...Se4
- 2.Sfxe4#
- 1...Sb5
- 2.Sfe4#
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sb7
- 2.Sfe4#
- 2.Rf5#
- 1...Sf7
- 2.Sfe4#
- 2.Rf5#
- 1...Sc8
- 2.Sfe4#
- 2.Rf5#
- 1...Se8
- 2.Sfe4#
- 2.Rf5#
- 1...Bh1
- Tries
- 1.Rh1?
- 1...Bxh1
- 2.Rf5#
- 1...Bxg5
- 2.Sg4#
- 1...Sf5
- 2.Rxf5#
- 1...Be4
- 2.Sfxe4#
- 1...Bg2
- 2.Rf5#
- 1...Bf3
- 2.Rf5#
- 1...Ba4
- 2.Sfe4#
- 2.Rf5#
- 1...Bb5
- 2.Sfe4#
- 2.Rf5#
- 1...Bd5
- 2.Rf5#
- 1...Bb7
- 2.Rf5#
- 1...Ba8
- 2.Rf5#
- 1...Sc4
- 2.Sfe4#
- 2.Rf5#
- 1...Se4
- 2.Sfxe4#
- 1...Sb5
- 2.Sfe4#
- 2.Rf5#
- 1...Sb7
- 2.Sfe4#
- 2.Rf5#
- 1...Sf7
- 2.Sfe4#
- 2.Rf5#
- 1...Sc8
- 2.Sfe4#
- 2.Rf5#
- 1...Se8
- 2.Sfe4#
- 2.Rf5#
- 1...Kxg5!
- 1...Bxh1
- 1.R1g2?
- 1...Bxg2
- 2.Rf5#
- 1...Bxg5
- 2.Sg4#
- 1...Sf5
- 2.Rxf5#
- 1...Be4
- 2.Sfxe4#
- 1...Bf3
- 2.Rf5#
- 1...Ba4
- 2.Sfe4#
- 2.Rf5#
- 1...Bb5
- 2.Sfe4#
- 2.Rf5#
- 1...Bd5
- 2.Rf5#
- 1...Bb7
- 2.Rf5#
- 1...Ba8
- 2.Rf5#
- 1...Sc4
- 2.Sfe4#
- 2.Rf5#
- 1...Se4
- 2.Sfxe4#
- 1...Sb5
- 2.Sfe4#
- 2.Rf5#
- 1...Sb7
- 2.Sfe4#
- 2.Rf5#
- 1...Sf7
- 2.Sfe4#
- 2.Rf5#
- 1...Sc8
- 2.Sfe4#
- 2.Rf5#
- 1...Se8
- 2.Sfe4#
- 2.Rf5#
- 1...hxg2!
- 1...Bxg2
- 1.R1g3?
- 1...Bxg5
- 2.Sg4#
- 1...Sf5
- 2.Rxf5#
- 1...Be4
- 2.Sfxe4#
- 1...Bh1
- 2.Rf5#
- 1...Bg2
- 2.Rf5#
- 1...Bf3
- 2.Rf5#
- 1...Ba4
- 2.Sfe4#
- 2.Rf5#
- 1...Bb5
- 2.Sfe4#
- 2.Rf5#
- 1...Bd5
- 2.Rf5#
- 1...Bb7
- 2.Rf5#
- 1...Ba8
- 2.Rf5#
- 1...Sc4
- 2.Sfe4#
- 2.Rf5#
- 1...Se4
- 2.Sfxe4#
- 1...Sb5
- 2.Sfe4#
- 2.Rf5#
- 1...Sb7
- 2.Sfe4#
- 2.Rf5#
- 1...Sf7
- 2.Sfe4#
- 2.Rf5#
- 1...Sc8
- 2.Sfe4#
- 2.Rf5#
- 1...Se8
- 2.Sfe4#
- 2.Rf5#
- 1...hxg3!
- 1...Bxg5
- 1.R1g4?
- 1...Sf5
- 2.Rxf5#
- 1...Be4
- 2.Sfxe4#
- 1...Bh1
- 2.Rf5#
- 1...Bg2
- 2.Rf5#
- 1...Bf3
- 2.Rf5#
- 1...Ba4
- 2.Sfe4#
- 2.Rf5#
- 1...Bb5
- 2.Sfe4#
- 2.Rf5#
- 1...Bd5
- 2.Rf5#
- 1...Bb7
- 2.Rf5#
- 1...Ba8
- 2.Rf5#
- 1...Sc4
- 2.Sfe4#
- 2.Rf5#
- 1...Se4
- 2.Sfxe4#
- 1...Sb5
- 2.Sfe4#
- 2.Rf5#
- 1...Sb7
- 2.Sfe4#
- 2.Rf5#
- 1...Sf7
- 2.Sfe4#
- 2.Rf5#
- 1...Sc8
- 2.Sfe4#
- 2.Rf5#
- 1...Se8
- 2.Sfe4#
- 2.Rf5#
- 1...Bxg5!
- 1...Sf5
- 1.Qd3?
- threat
- 2.Qc3#
- 2.Qd4#
- 1...Sf5
- 2.Rxf5#
- 2.Qxf5#
- 1...Sc4
- 2.Rf5#
- 2.Qf5#
- 1...Se4
- 2.Qf3#
- 2.Qd4#
- 1...Sb5
- 2.Rf5#
- 2.Qf5#
- 1...Sf7
- 2.Rf5#
- 2.Qf5#
- 1...Bg2!
- threat
- 1.Qc4?
- threat
- 2.Qc3#
- 2.Qd4#
- 1...Sxc4
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Se4
- 2.Qf7#
- 2.Qd4#
- 1...Sb5
- 2.Rf5#
- 2.Qf7#
- 2.Qf4#
- 1...Sf7
- 2.Rf5#
- 2.Qxf7#
- 2.Qf4#
- 1...Bg2!
- threat
- 1.Qa2?
- threat
- 2.Qxb2#
- 1...Sf5
- 2.Rxf5#
- 1...Sc4
- 2.Rf5#
- 1...Se4
- 2.Qf7#
- 1...Sb5
- 2.Rf5#
- 2.Qf7#
- 1...Sf7
- 2.Rf5#
- 2.Qxf7#
- 1...Bg2!
- threat
- 1.Qa3?
- threat
- 2.Qxb2#
- 2.Qc3#
- 1...Sf5
- 2.Rxf5#
- 1...Sc4
- 2.Rf5#
- 1...Se4
- 2.Qf3#
- 1...Sb5
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Bg2!
- threat
- 1.Qb6?
- threat
- 2.Qxb2#
- 1...Bg2
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Bb5
- 2.Sfe4#
- 2.Rf5#
- 1...Sc4
- 2.Sfe4#
- 2.Rf5#
- 1...Se4
- 2.Sfxe4#
- 1...Sb5
- 2.Sfe4#
- 2.Rf5#
- 1...Sf7
- 2.Sfe4#
- 2.Rf5#
- 1...cxb6!
- threat
- 1.Qxc6?
- threat
- 2.Sfe4#
- 2.Rf5#
- 1...Bxg5
- 2.Sg4#
- 1...dxc6!
- threat
- 1.Rh1?
- Keys
- 1.Qxe2!
- threat
- 2.Qe5#
- 1...Bxg5
- 2.Sg4#
- 1...Be4
- 2.Qxb2#
- 1...Sc4
- 2.Rf5#
- 1...Se4
- 2.Qf3#
- 1...Sf5
- 2.Rxf5#
- 1...Sf7
- 2.Rf5#
- threat
- 1.Qxe2!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- B(e);P_SPINS(f)::R1(G)
- B(e);N_GUARD,P_SPINS(f)::S(D),XB(e)
- B(h);SBLOCK,XR(G)::S(D)
- S(f);N_GUARD,P_SPINB(e)::S(D),XS(f)
- S(f);N_GUARD,P_SPINB(e)::R1(G),XS(f)
- Tries
- Try
- R(C);
- Vars
- B(e);P_SPINS(f),XR(C)::R1(G)
- B(h);SBLOCK,XR(G)::S(D)
- S(f);N_GUARD,P_SPINB(e)::R1(G),XS(f)
- B(e);N_GUARD,P_SPINS(f)::S(D),XB(e)
- B(e);P_SPINS(f)::R1(G)
- S(f);N_GUARD,P_SPINB(e)::S(D),XS(f)
- Refutation
- K(g);S_FLIGHT,XR(G)
- Try
- R(C);
- Vars
- B(e);P_SPINS(f),XR(C)::R1(G)
- B(h);SBLOCK,XR(G)::S(D)
- S(f);N_GUARD,P_SPINB(e)::R1(G),XS(f)
- B(e);N_GUARD,P_SPINS(f)::S(D),XB(e)
- B(e);P_SPINS(f)::R1(G)
- S(f);N_GUARD,P_SPINB(e)::S(D),XS(f)
- Refutation
- P(c);XR(C)
- Try
- R(C);
- Vars
- B(h);SBLOCK,XR(G)::S(D)
- S(f);N_GUARD,P_SPINB(e)::R1(G),XS(f)
- B(e);N_GUARD,P_SPINS(f)::S(D),XB(e)
- B(e);P_SPINS(f)::R1(G)
- S(f);N_GUARD,P_SPINB(e)::S(D),XS(f)
- Refutation
- P(d);XR(C)
- Try
- R(C);
- Vars
- S(f);N_GUARD,P_SPINB(e)::R1(G),XS(f)
- B(e);N_GUARD,P_SPINS(f)::S(D),XB(e)
- B(e);P_SPINS(f)::R1(G)
- S(f);N_GUARD,P_SPINB(e)::S(D),XS(f)
- Refutation
- B(h);XR(G)
- Try
- Q(I);
- Threat
- DUALS(2)
- Refutation
- B(e);
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- S(f);N_GUARD,XQ(I)::R1(G)
- S(f);N_GUARD::R1(G),XS(f)
- Refutation
- B(e);
- Try
- Q(I);
- Threat
- QAB(I),XP(a)
- Vars
- S(f);N_GUARD::R1(G),XS(f)
- S(f);N_GUARD::R1(G)
- S(f);N_GUARD::QAR1(I)
- Refutation
- B(e);
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- S(f);N_GUARD::R1(G),XS(f)
- S(f);N_GUARD::R1(G)
- S(f);N_GUARD,S_CUTB(e)::QAR(I)
- Refutation
- B(e);
- Try
- Q(I);
- Threat
- QAB(I),XP(a)
- Vars
- B(e);P_SPINS(f)::R1(G)
- S(f);N_GUARD,P_SPINB(e)::R1(G),XS(f)
- S(f);N_GUARD,P_SPINB(e)::S(D),XS(f)
- Refutation
- P(i);XQ(I)
- Try
- Q(I);P_PINS(f),XB(e)
- Threat
- DUALS(2)
- Vars
- B(h);SBLOCK,XR(G)::S(D)
- Refutation
- P(j);N_SPINS(f),XQ(I)
- Try
- Actual
- Q(I);P_SPINQ(I),XP(b)
- Threat
- QAB1(I)
- Vars
- B(h);SBLOCK,XR(G)::S(D)
- B(e);N_PINQ(I)::QAB(I),XP(a)
- S(f);N_GUARD::R1(G)
- S(f);N_PINQ(I)::QAR(I)
- S(f);N_GUARD::R1(G),XS(f)
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).