MESON Chess Problem Database
Problem Display
PID: 186636 (N2N3Q/Rp2n1r1/3B4/1k2nbR1/8/K2PP3/4B3/6b1 w - - 0 1)
Henry, S
Chess, 1959
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Bxd3
- 2.Bxd3#
- 1...Bh3
- 2.d4#
- 1...Be4
- 2.dxe4#
- 1...Bd7
- 2.d4#
- 1...Bc8
- 2.d4#
- 1...Sxd3
- 2.Bxd3#
- 1...Sf3
- 2.d4#
- 1...Sc4+
- 2.dxc4#
- 1...Sg4
- 2.d4#
- 1...S5c6
- 2.d4#
- 1...S5g6
- 2.d4#
- 1...Sd7
- 2.d4#
- 1...Sf7
- 2.d4#
- 1...b6
- 2.Sc7#
- 1...Bxd3
- Tries
- 1.Bb4?
- threat
- 2.Ra5#
- 1...Sc4+
- 2.dxc4#
- 1...Bxd3
- 2.Bxd3#
- 1...Sxd3
- 2.Bxd3#
- 1...S5c6
- 2.d4#
- 1...b6
- 2.Sc7#
- 1...S7c6!
- threat
- 1.Qh4?
- threat
- 2.Qa4#
- 2.Qb4#
- 1...Sc4+
- 2.Qxc4#
- 2.dxc4#
- 1...Be4
- 2.dxe4#
- 1...Sg4
- 2.d4#
- 1...S5c6
- 2.Qa4#
- 2.Qc4#
- 2.d4#
- 1...Sd5
- 2.Qa4#
- 1...S7c6
- 2.Qa4#
- 1...Bg4!
- threat
- 1.Qe8+?
- 1...Bd7
- 2.d4#
- 1...S5c6
- 2.d4#
- 1...Sd7
- 2.d4#
- 1...S7c6!
- 1...Bd7
- 1.d4+?
- 1...Bd3
- 2.Bxd3#
- 1...Sd3
- 2.Bxd3#
- 1...Sc4+!
- 1...Bd3
- 1.Bb4?
- Keys
- 1.Qh1!
- threat
- 2.Qxb7#
- 1...Sc4+
- 2.dxc4#
- 1...Bxe3
- 2.Qb1#
- 1...Bxd3
- 2.Bxd3#
- 1...Sxd3
- 2.Bxd3#
- 1...Be4
- 2.dxe4#
- 1...Bc8
- 2.d4#
- 1...Sf3
- 2.d4#
- 1...S5c6
- 2.d4#
- 1...Sd7
- 2.d4#
- 1...Sd5
- 2.Qxd5#
- 1...S7c6
- 2.Qd5#
- 1...S7g6
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...b6
- 2.Sc7#
- threat
- 1.Qh1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 5
- Sets
- B(d);OGATE,P_SPINB(d),P_SPINS(c),XP(C)::B(A),XB(d)
- B(d);N_GUARD,P_SPINS(c)::B(A)+P(C)
- B(d);OGATE,P_SPINS(c)::B(A)+P(C),XB(d)
- S(c);OGATE,P_SPINB(d),P_SPINS(c),XP(C)::B(A),XS(c)
- S(c);N_GUARD,P_SPINB(d)::B(A)+P(C)
- S(c);CHECK,OGATE,P_SPINB(d)::P(C),XS(c)
- P(e);SBLOCK::S(H)
- Tries
- Try
- B(F);
- Threat
- R1(G)
- Vars
- S(c);CHECK,OGATE,P_SPINB(d)::P(C),XS(c)
- B(d);OGATE,P_SPINB(d),P_SPINS(c),XP(C)::B(A),XB(d)
- S(c);OGATE,P_SPINB(d),P_SPINS(c),XP(C)::B(A),XS(c)
- S(c);N_GUARD,P_SPINB(d)::B(A)+P(C)
- P(e);SBLOCK::S(H)
- Refutation
- S(f);
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- B(d);OGATE,P_SPINS(c)::B(A)+P(C),XB(d)
- S(c);N_GUARD,P_SPINB(d)::B(A)+P(C)
- S(f);::QAB1(J)
- Refutation
- B(d);P_SPINS(c)
- Try
- Q(J);CHECK
- Vars
- B(d);P_SPINB(d),P_SPINS(c)::B(A)+P(C)
- S(c);P_SPINB(d),P_SPINS(c)::B(A)+P(C)
- Refutation
- S(f);P_SPINS(f)
- Try
- P(C);CHECK
- Vars
- B(d);N_GUARD,P_SPINB(d),P_SPINS(c)::B(A),XB(d)
- S(c);N_GUARD,P_SPINB(d),P_SPINS(c)::B(A),XS(c)
- Refutation
- S(c);CHECK,P_SPINB(d),P_SPINS(c)
- Try
- Actual
- Q(J);
- Threat
- QAR2(J),XP(e)
- Vars
- S(c);CHECK,OGATE,P_SPINB(d)::P(C),XS(c)
- B(a);OGATE,XP(D)::QAR(J)
- B(d);OGATE,P_SPINB(d),P_SPINS(c),XP(C)::B(A),XB(d)
- S(c);OGATE,P_SPINB(d),P_SPINS(c),XP(C)::B(A),XS(c)
- B(d);OGATE,P_SPINS(c)::B(A)+P(C),XB(d)
- B(d);N_GUARD,P_SPINS(c)::B(A)+P(C)
- S(c);N_GUARD,P_SPINB(d)::B(A)+P(C)
- S(f);N_GUARD::QAR2(J),XS(f)
- S(f);N_GUARD::QAR2(J)
- P(e);SBLOCK::S(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).