MESON Chess Problem Database
Problem Display
PID: 87614 (2n3r1/4p1R1/K1N3br/pR2B1bp/1p4kp/q3p2p/7P/3N1Q2 w - - 0 1)
Lewis, Brian Noel
The Problemist, 1953
#2
8 + 14
| 6490 | yacpdb | 2009 |
| 56 | The Problemist | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Bf4
- 2.Qxf4#
- 1...Bf6
- 2.Qf4#
- 1...Bb1
- 2.Qf4#
- 1...Bc2
- 2.Qf4#
- 1...Bd3
- 2.Sxe3#
- 2.Qf4#
- 1...Be4
- 2.Qf4#
- 1...Bf5
- 2.Qe2#
- 2.Qf4#
- 1...Bf7
- 2.Qf4#
- 1...Bh7
- 2.Qf4#
- 1...Be8
- 2.Qf4#
- 1...Bf4
- Tries
- 1.Sf2+?
- 1...Kf3
- 2.Sd4#
- 1...Kf5
- 2.Sd4#
- 2.Qxh3#
- 1...exf2!
- 1...Kf3
- 1.Bc3?
- threat
- 2.Se5#
- 1...Bf4
- 2.Qe2#
- 1...Bf6
- 2.Sxe3#
- 2.Qf5#
- 1...Bb1
- 2.Sxe3#
- 2.Rbxg5#
- 1...Bc2
- 2.Sxe3#
- 2.Rbxg5#
- 1...Bd3
- 2.Sxe3#
- 1...Be4
- 2.Sxe3#
- 2.Rbxg5#
- 1...Bf5
- 2.Sxe3#
- 2.Qxf5#
- 1...Bf7
- 2.Sxe3#
- 2.Rbxg5#
- 2.Qf5#
- 1...Bh7
- 2.Sxe3#
- 2.Rbxg5#
- 1...Be8
- 2.Sxe3#
- 2.Rbxg5#
- 2.Qf5#
- 1...e5
- 2.Sxe5#
- 1...Qxc3!
- threat
- 1.Bf6?
- threat
- 2.Se5#
- 2.Rxg5#
- 1...Bxf6
- 2.Qf5#
- 1...Qb2
- 2.Rxg5#
- 1...Qa1
- 2.Rxg5#
- 1...Qc3
- 2.Rxg5#
- 1...Qd3
- 2.Se5#
- 1...Bf4
- 2.Qe2#
- 1...Bd3
- 2.Sxe3#
- 2.Se5#
- 1...Bf5
- 2.Se5#
- 2.Qxf5#
- 1...e5
- 2.Sxe5#
- 1...exf6!
- threat
- 1.Bc7?
- threat
- 2.Se5#
- 2.Qe2#
- 1...Qa1
- 2.Qe2#
- 1...Qa2
- 2.Se5#
- 1...Qc3
- 2.Qe2#
- 1...Qd3
- 2.Se5#
- 1...Rf8
- 2.Se5#
- 1...Bf4
- 2.Qe2#
- 2.Qxf4#
- 1...Bf6
- 2.Qe2#
- 2.Qf4#
- 2.Qf5#
- 1...Bb1
- 2.Rbxg5#
- 2.Qe2#
- 2.Qf4#
- 1...Bc2
- 2.Rbxg5#
- 2.Qe2#
- 2.Qf4#
- 1...Bd3
- 2.Sxe3#
- 2.Qf4#
- 1...Be4
- 2.Rbxg5#
- 2.Qf4#
- 1...Bf5
- 2.Qe2#
- 2.Qf4#
- 2.Qxf5#
- 1...Bf7
- 2.Rbxg5#
- 2.Qe2#
- 2.Qf4#
- 2.Qf5#
- 1...Bh7
- 2.Rbxg5#
- 2.Qe2#
- 2.Qf4#
- 1...Be8
- 2.Rbxg5#
- 2.Qe2#
- 2.Qf4#
- 2.Qf5#
- 1...Sd6
- 2.Se5#
- 1...e2
- 2.Se5#
- 1...e5
- 2.Sxe5#
- 1...Qb2!
- threat
- 1.Bb8?
- threat
- 2.Se5#
- 2.Qe2#
- 1...Qa1
- 2.Qe2#
- 1...Qa2
- 2.Se5#
- 1...Qc3
- 2.Qe2#
- 1...Qd3
- 2.Se5#
- 1...Rf8
- 2.Se5#
- 1...Bf4
- 2.Qe2#
- 2.Qxf4#
- 1...Bf6
- 2.Qe2#
- 2.Qf4#
- 2.Qf5#
- 1...Bb1
- 2.Rbxg5#
- 2.Qe2#
- 2.Qf4#
- 1...Bc2
- 2.Rbxg5#
- 2.Qe2#
- 2.Qf4#
- 1...Bd3
- 2.Sxe3#
- 2.Qf4#
- 1...Be4
- 2.Rbxg5#
- 2.Qf4#
- 1...Bf5
- 2.Qe2#
- 2.Qf4#
- 2.Qxf5#
- 1...Bf7
- 2.Rbxg5#
- 2.Qe2#
- 2.Qf4#
- 2.Qf5#
- 1...Bh7
- 2.Rbxg5#
- 2.Qe2#
- 2.Qf4#
- 1...Be8
- 2.Rbxg5#
- 2.Qe2#
- 2.Qf4#
- 2.Qf5#
- 1...Sd6
- 2.Se5#
- 1...e2
- 2.Se5#
- 1...e5
- 2.Sxe5#
- 1...Qb2!
- threat
- 1.Qg2+?
- 1...Kf5
- 2.Sd4#
- 1...hxg2!
- 1...Kf5
- 1.Sf2+?
- Keys
- 1.Bd4!
- threat
- 2.Se5#
- 1...Bf4
- 2.Qe2#
- 1...Bf6
- 2.Qf5#
- 1...Bb1
- 2.Rbxg5#
- 1...Bc2
- 2.Rbxg5#
- 1...Bd3
- 2.Sxe3#
- 1...Be4
- 2.Rbxg5#
- 1...Bf5
- 2.Qxf5#
- 1...Bf7
- 2.Rbxg5#
- 2.Qf5#
- 1...Bh7
- 2.Rbxg5#
- 1...Be8
- 2.Rbxg5#
- 2.Qf5#
- 1...e5
- 2.Sxe5#
- threat
- 1.Bd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 6
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- B(h);N_GUARD,P_SPINB(j)::QAR1(B),XB(h)
- B(h);N_GUARD,P_SPINB(j)::QAR1(B)
- B(j);P_PINS(G),P_SPINB(h)::QAR1(B)
- Tries
- Try
- S(A);CHECK
- Vars
- K(e);S_FLIGHT::S(G)
- Refutation
- P(b);XS(A)
- Try
- B(E);
- Threat
- S(G)
- Vars
- B(h);P_SPINB(j),SBLOCK::QAB(B)
- B(j);P_PINR(D),P_PINS(G),P_SPINB(h)::S(A),XP(b)
- P(l);::S(G),XP(l)
- Refutation
- Q(a);XB(E)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- B(h);P_SPINB(j),XB(E)::QAB1(B)
- Q(a);::R1(D),XB(h)
- Q(a);P_PINR(D)::S(G)
- B(h);P_SPINB(j),SBLOCK::QAB(B)
- P(l);::S(G),XP(l)
- Refutation
- P(l);XB(E)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- Q(a);::QAB(B)
- Q(a);::S(G)
- Q(a);P_PINR(D)::S(G)
- R(n);::S(G)
- S(m);::S(G)
- P(b);::S(G)
- P(l);::S(G),XP(l)
- Refutation
- Q(a);
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- Q(a);::QAB(B)
- Q(a);::S(G)
- Q(a);P_PINR(D)::S(G)
- R(n);::S(G)
- S(m);::S(G)
- P(b);::S(G)
- P(l);::S(G),XP(l)
- Refutation
- Q(a);
- Try
- Q(B);CHECK
- Vars
- K(e);S_FLIGHT::S(G)
- Refutation
- P(c);XQ(B)
- Try
- Actual
- B(E);
- Threat
- S(G)
- Vars
- B(h);P_SPINB(j),SBLOCK::QAB(B)
- B(h);P_SPINB(j)::QAB1(B)
- B(j);P_PINS(G),P_SPINB(h)::R1(D),XB(h)
- B(j);P_PINR(D),P_PINS(G),P_SPINB(h),S_CUTQ(a)::S(A),XP(b)
- B(j);N_GUARD,P_PINS(G),P_SPINB(h)::QAB1(B),XB(j)
- P(l);::S(G),XP(l)
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).