MESON Chess Problem Database
Problem Display
PID: 55870 (7K/8/4Qp2/Bp1p3p/q4P2/2pPN1Nb/r1R1B1Rr/b3k3 w - - 0 1)
Mansfield, Comins
Comm., Problem (Zagreb), 1977-1978
#2
10 + 11
| 4054 | Complete Mansfield/III | 1999 |
| 5503 | ISC | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Rb2
- 2.Bxc3#
- 1...Rb2
- Tries
- 1.Bf3?
- 1...Qxc2
- 2.Sxc2#
- 1...Qxf4
- 2.Rc1#
- 1...Qxa5
- 2.Sg4#
- 2.Sef5#
- 2.Rc1#
- 1...Rxc2
- 2.Sxc2#
- 1...Rxg2
- 2.Sxg2#
- 1...Bxg2
- 2.Sxg2#
- 2.Sc4#
- 1...Bxe6
- 2.Rg1#
- 1...Qb3
- 2.Sg4#
- 2.Sef5#
- 1...Qa3
- 2.Sg4#
- 2.Sef5#
- 1...Qb4
- 2.Rc1#
- 1...Qc4
- 2.Rc1#
- 1...Qd4
- 2.Rc1#
- 1...Qe4
- 2.Rc1#
- 1...Rb2
- 2.Bxc3#
- 1...Ra3
- 2.Rce2#
- 1...Rh1
- 2.Rge2#
- 1...Bb2
- 2.Rce2#
- 1...Bg4
- 2.Rg1#
- 1...Bf5
- 2.Rg1#
- 1...b4
- 2.Sg4#
- 2.Sef5#
- 1...d4
- 2.Sg4#
- 2.Sef5#
- 1...f5
- 2.Sc4#
- 1...h4!
- 1...Qxc2
- 1.Bg4?
- threat
- 2.Sc4#
- 1...Qxc2
- 2.Sxc2#
- 1...Qxf4
- 2.Rc1#
- 1...Rxc2
- 2.Sxc2#
- 1...Rxg2
- 2.Sxg2#
- 1...Bxg2
- 2.Sxg2#
- 1...Bxg4
- 2.Rg1#
- 1...Qc4
- 2.Sxc4#
- 2.Rc1#
- 1...Qd4
- 2.Rc1#
- 1...Qe4
- 2.Rc1#
- 1...hxg4!
- threat
- 1.Rc1+?
- 1...Qd1
- 2.Rxd1#
- 1...Kd2!
- 1...Qd1
- 1.Rg1+?
- 1...Bf1
- 2.Rxf1#
- 1...Kf2!
- 1...Bf1
- 1.Bf3?
- Keys
- 1.Bxh5!
- 1...Qxc2
- 2.Sxc2#
- 1...Qxf4
- 2.Rc1#
- 1...Qxa5
- 2.Sef5#
- 2.Rc1#
- 1...Rxc2
- 2.Sxc2#
- 1...Rxg2
- 2.Sxg2#
- 1...Bxg2
- 2.Sxg2#
- 1...Bxe6
- 2.Rg1#
- 1...Qb3
- 2.Sef5#
- 1...Qa3
- 2.Sef5#
- 1...Qb4
- 2.Rc1#
- 1...Qc4
- 2.Rc1#
- 1...Qd4
- 2.Rc1#
- 1...Qe4
- 2.Rc1#
- 1...Rb2
- 2.Bxc3#
- 1...Ra3
- 2.Rce2#
- 1...Rh1
- 2.Rge2#
- 1...Bb2
- 2.Rce2#
- 1...Bg4
- 2.Rg1#
- 1...Bf5
- 2.Rg1#
- 1...b4
- 2.Sef5#
- 1...d4
- 2.Sef5#
- 1...f5
- 2.Sc4#
- 1...Qxc2
- 1.Bxh5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 20
- REMOVED MATES = 0
- Sets
- R(c);S_CUTB(a)::B(H),XP(e)
- Tries
- Try
- B(B);
- Vars
- Q(g);XR(A)::QAR(I)+S(E),DCHECK,XQ(g)
- Q(g);N_GUARD,XP(G)::R(A)
- R(c);XR(A)::QAR(I)+S(E),DCHECK,XR(c)
- R(d);XR(C)::QAR(I)+S(E),DCHECK,XR(d)
- B(f);N_GUARD,XQ(I)::R(C)
- Q(g);N_GUARD,N_SPINP(e)::R(A)
- Q(g);N_GUARD::R(A)
- R(c);S_CUTB(a)::B(H),XP(e)
- R(c);N_GUARD::R1(A)
- R(d);N_GUARD::R1(C)
- B(a);S_CUTR(c)::R1(A)
- B(f);N_GUARD::R(C)
- P(k);S_CUTB(f)::QAR(I)+S(E)
- Refutation
- P(j);
- Try
- B(B);
- Threat
- QAR(I)+S(E)
- Vars
- Q(g);XR(A)::QAR(I)+S(E),DCHECK,XQ(g)
- Q(g);N_GUARD,XP(G)::R(A)
- R(c);XR(A)::QAR(I)+S(E),DCHECK,XR(c)
- R(d);XR(C)::QAR(I)+S(E),DCHECK,XR(d)
- B(f);XR(C)::QAR(I)+S(E),DCHECK,XB(f)
- B(f);N_GUARD,XB(B)::R(C)
- Q(g);N_GUARD::R(A)
- Refutation
- P(j);XB(B)
- Try
- R(A);CHECK
- Vars
- Q(g);N_GUARD,P_SPINQ(g)::R1(A),XQ(g)
- Refutation
- K(b);S_FLIGHT
- Try
- R(C);CHECK
- Vars
- B(f);N_GUARD,P_SPINB(f)::R1(C),XB(f)
- Refutation
- K(b);N_SPINP(e),S_FLIGHT
- Try
- Actual
- B(B);XP(j)
- Vars
- Q(g);XR(A)::QAR(I)+S(E),DCHECK,XQ(g)
- Q(g);N_GUARD,XP(G)::R(A)
- R(c);XR(A)::QAR(I)+S(E),DCHECK,XR(c)
- R(d);XR(C)::QAR(I)+S(E),DCHECK,XR(d)
- B(f);P_PINB(B),XR(C)::QAR(I)+S(E),DCHECK,XB(f)
- B(f);N_GUARD,P_PINB(B),XQ(I)::R(C)
- Q(g);N_GUARD::QAR(I)+S(E)
- Q(g);N_GUARD,N_SPINP(e)::R(A)
- Q(g);N_GUARD::R(A)
- R(c);S_CUTB(a)::B(H),XP(e)
- R(c);N_GUARD::R1(A)
- R(d);N_GUARD::R1(C)
- B(a);S_CUTR(c)::R1(A)
- B(f);N_GUARD,P_PINB(B)::R(C)
- P(h);N_SPINP(e),S_CUTQ(g)::QAR(I)+S(E)
- P(i);S_CUTQ(g)::QAR(I)+S(E)
- P(k);S_CUTB(f)::QAR(I)+S(E)
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).