MESON Chess Problem Database
Problem Display
PID: 1170 (8/3p1K2/3p4/2p1pp1N/R1pbk2p/Q6B/2P2BP1/1N4n1 w - - 0 1)
Howard, David M
Problem Observer, 1996
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Ba1
- 2.Qd3#
- 1...Bb2
- 2.Qd3#
- 1...Bxf2
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 1...Be3
- 2.Qd3#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sxh3
- 2.Qf3#
- 1...c3
- 2.Sxc3#
- 1...f4
- 2.Sf6#
- 1...d5
- 2.Sd2#
- 1...Ba1
- Tries
- 1.Kg6?
- 1...Bxf2
- 2.Qd3#
- 1...Sxh3
- 2.Qf3#
- 1...Be3
- 2.Qd3#
- 1...Ba1
- 2.Qd3#
- 1...Bb2
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...c3
- 2.Sxc3#
- 1...f4
- 2.Sf6#
- 1...d5
- 2.Sd2#
- 2.Bxf5#
- 1...Kd5!
- 1...Bxf2
- 1.Ke7?
- 1...Bxf2
- 2.Qd3#
- 1...Sxh3
- 2.Qf3#
- 1...Be3
- 2.Qd3#
- 1...Ba1
- 2.Qd3#
- 1...Bb2
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...c3
- 2.Sxc3#
- 1...f4
- 2.Sf6#
- 1...d5
- 2.Sd2#
- 1...Kd5!
- 1...Bxf2
- 1.Kg7?
- 1...Bxf2
- 2.Qd3#
- 1...Sxh3
- 2.Qf3#
- 1...Be3
- 2.Qd3#
- 1...Ba1
- 2.Qd3#
- 1...Bb2
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...c3
- 2.Sxc3#
- 1...f4
- 2.Sf6#
- 1...d5
- 2.Sd2#
- 1...Kd5!
- 1...Bxf2
- 1.Ke8?
- 1...Bxf2
- 2.Qd3#
- 1...Sxh3
- 2.Qf3#
- 1...Be3
- 2.Qd3#
- 1...Ba1
- 2.Qd3#
- 1...Bb2
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...c3
- 2.Sxc3#
- 1...f4
- 2.Sf6#
- 1...d5
- 2.Sd2#
- 1...Kd5!
- 1...Bxf2
- 1.Kf8?
- 1...Bxf2
- 2.Qd3#
- 1...Sxh3
- 2.Qf3#
- 1...Be3
- 2.Qd3#
- 1...Ba1
- 2.Qd3#
- 1...Bb2
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...c3
- 2.Sxc3#
- 1...f4
- 2.Sf6#
- 1...d5
- 2.Sd2#
- 1...Kd5!
- 1...Bxf2
- 1.Kg8?
- 1...Bxf2
- 2.Qd3#
- 1...Sxh3
- 2.Qf3#
- 1...Be3
- 2.Qd3#
- 1...Ba1
- 2.Qd3#
- 1...Bb2
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...c3
- 2.Sxc3#
- 1...f4
- 2.Sf6#
- 1...d5
- 2.Sd2#
- 1...Kd5!
- 1...Bxf2
- 1.Bxg1?
- threat
- 2.Qf3#
- 1...Bxg1
- 2.Qd3#
- 1...Bf2
- 2.Qd3#
- 1...Be3
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 1...c3
- 2.Sxc3#
- 1...Kd5!
- threat
- 1.Rb4?
- 1...Kd5
- 2.Qa8#
- 1...Bxf2
- 2.Qd3#
- 1...Sxh3
- 2.Qf3#
- 1...Be3
- 2.Qd3#
- 1...Ba1
- 2.Qd3#
- 1...Bb2
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...c3
- 2.Sxc3#
- 1...f4
- 2.Sf6#
- 1...d5
- 2.Sd2#
- 1...cxb4!
- 1...Kd5
- 1.Rxc4?
- threat
- 2.Sc3#
- 1...Se2
- 2.Qf3#
- 1...Kd5!
- threat
- 1.Qc3?
- 1...Bxf2
- 2.Qd3#
- 1...Bxc3
- 2.Sxc3#
- 1...Sxh3
- 2.Qf3#
- 1...Be3
- 2.Qd3#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...f4
- 2.Sf6#
- 1...d5
- 2.Sd2#
- 1...Kd5!
- 1...Bxf2
- 1.Qd3+?
- 1...cxd3
- 2.Sc3#
- 1...Kd5!
- 1...cxd3
- 1.Kg6?
- Keys
- 1.Qb3!
- 1...Kd5
- 2.Qb7#
- 1...Bxf2
- 2.Qd3#
- 1...Sxh3
- 2.Qf3#
- 1...cxb3
- 2.Sc3#
- 1...Be3
- 2.Qd3#
- 1...Ba1
- 2.Qd3#
- 1...Bb2
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...c3
- 2.Sxc3#
- 1...f4
- 2.Sf6#
- 1...d5
- 2.Sd2#
- 1...Kd5
- 1.Qb3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(c);P_SPINP(b)::QAB1(E)
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- B(c);N_GUARD,P_SPINP(b)::S(A),XB(c)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- S(a);N_GUARD,XB(F)::QAB1(E)
- P(b);P_SPINB(c)::S(A),XP(b)
- P(h);SBLOCK::S(H)
- P(i);SBLOCK::S(A)
- Tries
- Try
- K(I);S_FLIGHT
- Vars
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- S(a);N_GUARD,XB(F)::QAB1(E)
- B(c);P_SPINP(b)::QAB1(E)
- B(c);N_GUARD,P_SPINP(b)::S(A),XB(c)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- P(b);P_SPINB(c)::S(A),XP(b)
- P(h);SBLOCK::S(H)
- Refutation
- K(d);S_FLIGHT
- Try
- K(I);P-FLIGHT
- Vars
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- S(a);N_GUARD,XB(F)::QAB1(E)
- B(c);P_SPINP(b)::QAB1(E)
- B(c);N_GUARD,P_SPINP(b)::S(A),XB(c)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- P(b);P_SPINB(c)::S(A),XP(b)
- P(h);SBLOCK::S(H)
- P(i);SBLOCK::S(A)
- Refutation
- K(d);S_FLIGHT
- Try
- K(I);P-FLIGHT
- Vars
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- S(a);N_GUARD,XB(F)::QAB1(E)
- B(c);P_SPINP(b)::QAB1(E)
- B(c);N_GUARD,P_SPINP(b)::S(A),XB(c)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- P(b);P_SPINB(c)::S(A),XP(b)
- P(h);SBLOCK::S(H)
- P(i);SBLOCK::S(A)
- Refutation
- K(d);S_FLIGHT
- Try
- K(I);S_FLIGHT
- Vars
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- S(a);N_GUARD,XB(F)::QAB1(E)
- B(c);P_SPINP(b)::QAB1(E)
- B(c);N_GUARD,P_SPINP(b)::S(A),XB(c)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- P(b);P_SPINB(c)::S(A),XP(b)
- P(h);SBLOCK::S(H)
- P(i);SBLOCK::S(A)
- Refutation
- K(d);S_FLIGHT
- Try
- K(I);P-FLIGHT
- Vars
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- S(a);N_GUARD,XB(F)::QAB1(E)
- B(c);P_SPINP(b)::QAB1(E)
- B(c);N_GUARD,P_SPINP(b)::S(A),XB(c)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- P(b);P_SPINB(c)::S(A),XP(b)
- P(h);SBLOCK::S(H)
- P(i);SBLOCK::S(A)
- Refutation
- K(d);S_FLIGHT
- Try
- K(I);S_FLIGHT
- Vars
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- S(a);N_GUARD,XB(F)::QAB1(E)
- B(c);P_SPINP(b)::QAB1(E)
- B(c);N_GUARD,P_SPINP(b)::S(A),XB(c)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- P(b);P_SPINB(c)::S(A),XP(b)
- P(h);SBLOCK::S(H)
- P(i);SBLOCK::S(A)
- Refutation
- K(d);S_FLIGHT
- Try
- B(C);XS(a)
- Threat
- QAB1(E)
- Vars
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- B(c);P_SPINP(b)::QAB1(E)
- B(c);N_GUARD,P_SPINP(b)::S(A),XB(c)
- P(b);P_SPINB(c)::S(A),XP(b)
- Refutation
- K(d);S_FLIGHT
- Try
- R(G);
- Vars
- K(d);S_FLIGHT::QAB(E)
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- S(a);N_GUARD,XB(F)::QAB1(E)
- B(c);P_SPINP(b)::QAB1(E)
- B(c);N_GUARD,P_SPINP(b)::S(A),XB(c)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- P(b);P_SPINB(c)::S(A),XP(b)
- P(h);SBLOCK::S(H)
- P(i);SBLOCK::S(A)
- Refutation
- P(f);XR(G)
- Try
- R(G);P_PINB(c),XP(b)
- Threat
- S(A)
- Vars
- S(a);N_GUARD::QAB1(E)
- Refutation
- K(d);N_SPINB(c),S_FLIGHT
- Try
- Q(E);
- Vars
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- B(c);P_SPINP(b),XQ(E)::S(A),XB(c)
- S(a);N_GUARD,XB(F)::QAB1(E)
- B(c);P_SPINP(b)::QAB1(E)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- P(h);SBLOCK::S(H)
- P(i);SBLOCK::S(A)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(E);CHECK
- Vars
- P(b);P_SPINB(c),XQ(E)::S(A)
- Refutation
- K(d);P_SPINB(c),S_FLIGHT
- Try
- Actual
- Q(E);
- Vars
- K(d);P_SPINP(b),S_FLIGHT::QAB(E)
- B(c);P_SPINP(b),XB(C)::QAB1(E)
- S(a);N_GUARD,XB(F)::QAB1(E)
- P(b);P_SPINB(c),XQ(E)::S(A)
- B(c);P_SPINP(b)::QAB1(E)
- B(c);N_GUARD,P_SPINP(b)::S(A),XB(c)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- P(b);P_SPINB(c)::S(A),XP(b)
- P(h);SBLOCK::S(H)
- P(i);SBLOCK::S(A)
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).