MESON Chess Problem Database
Problem Display
PID: 243747 (4r1b1/3pP3/PPk3NR/K6R/3P4/pP3N2/5nBB/2r5 w - - 0 1)
Berg, Wolfgang
Schach, 1986
#2
12 + 7
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rc5#
- 1...Rb1
- 2.Rc5#
- 1...Rd1
- 2.Rc5#
- 1...Re1
- 2.Rc5#
- 1...Rf1
- 2.Rc5#
- 1...Rg1
- 2.Rc5#
- 1...Rh1
- 2.Rc5#
- 1...Rc5+
- 2.Rxc5#
- 1...Rxe7
- 2.Sxe7#
- 1...Rd8
- 2.exd8S#
- 1...Bc4
- 2.Rc5#
- 1...Bd5
- 2.Sge5#
- 1...d5
- 2.Sge5#
- 1...d6
- 2.Sfe5#
- 1...Ra1
- Tries
- 1.Se1+?
- 1...Bd5
- 2.Se5#
- 2.Bxd5#
- 1...d5
- 2.Se5#
- 1...Se4!
- 1...Bd5
- 1.Sg1+?
- 1...Bd5
- 2.Se5#
- 2.Bxd5#
- 1...d5
- 2.Se5#
- 1...Se4!
- 1...Bd5
- 1.Sd2+?
- 1...Bd5
- 2.Se5#
- 2.Bxd5#
- 1...d5
- 2.Se5#
- 1...Se4!
- 1...Bd5
- 1.Sfh4+?
- 1...Bd5
- 2.Se5#
- 2.Bxd5#
- 1...d5
- 2.Se5#
- 1...Se4!
- 1...Bd5
- 1.Sg5+?
- 1...Bd5
- 2.Se5#
- 1...d5
- 2.Se5#
- 1...Se4!
- 1...Bd5
- 1.Sf4+?
- 1...d6
- 2.Se5#
- 1...Be6!
- 1...d6
- 1.Sgh4+?
- 1...d6
- 2.Se5#
- 2.Rxd6#
- 1...Be6!
- 1...d6
- 1.Sf8+?
- 1...d6
- 2.Se5#
- 2.Rxd6#
- 1...Be6!
- 1...d6
- 1.Sh8+?
- 1...d6
- 2.Se5#
- 2.Rxd6#
- 1...Be6!
- 1...d6
- 1.Bc7?
- threat
- 2.Sfe5#
- 1...Rc5+
- 2.Rxc5#
- 1...Se4!
- threat
- 1.Rb5?
- threat
- 2.Sge5#
- 1...Rc5
- 2.Rxc5#
- 1...Be6!
- threat
- 1.Se1+?
- Keys
- 1.b4!
- threat
- 2.b5#
- 1...Rc5+
- 2.Rxc5#
- 1...d5
- 2.Sge5#
- 1...d6
- 2.Sfe5#
- 1...Rb1
- 2.Rc5#
- 1...Bc4
- 2.Rc5#
- threat
- 1.b4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- R(a);N_GUARD::R1(G)
- R(a);CHECK,N_GUARD::R1(G),XR(a)
- R(f);XP(L)::R(K)+S(J),DCHECK,XR(f)
- R(f);OGATE::PXR(f)=S
- B(g);S_CUTR(a)::R1(G)
- B(g);SBLOCK::R(K)+S(J),DCHECK
- P(e);SBLOCK::R(K)+S(J),DCHECK
- P(e);SBLOCK::B(A)+S(D),DCHECK
- Tries
- Try
- S(D);CHECK
- Vars
- P(e);P_SPINP(e)::R(K)+S(J),DCHECK
- Refutation
- S(b);P_SPINS(b)
- Try
- S(D);CHECK
- Vars
- P(e);P_SPINP(e)::R(K)+S(J),DCHECK
- Refutation
- S(b);P_SPINS(b)
- Try
- S(D);CHECK
- Vars
- P(e);P_SPINP(e)::R(K)+S(J),DCHECK
- Refutation
- S(b);P_SPINS(b)
- Try
- S(D);CHECK
- Vars
- P(e);P_SPINP(e)::R(K)+S(J),DCHECK
- Refutation
- S(b);P_SPINS(b)
- Try
- S(D);CHECK
- Vars
- B(g);P_SPINB(g)::R(K)+S(J),DCHECK
- P(e);P_SPINP(e)::R(K)+S(J),DCHECK
- Refutation
- S(b);P_SPINS(b)
- Try
- S(J);CHECK
- Vars
- P(e);P_SPINP(e)::B(A)+S(D),DCHECK
- Refutation
- B(g);P_SPINB(g)
- Try
- S(J);CHECK
- Refutation
- B(g);P_SPINB(g)
- Try
- S(J);CHECK
- Refutation
- B(g);P_SPINB(g)
- Try
- S(J);CHECK
- Refutation
- B(g);P_SPINB(g)
- Try
- B(B);
- Threat
- B(A)+S(D),DCHECK
- Vars
- R(a);CHECK,N_GUARD::R1(G),XR(a)
- Refutation
- S(b);
- Try
- R(G);
- Threat
- R(K)+S(J),DCHECK
- Vars
- R(a);N_GUARD,P_PINR(G)::R1(G),XR(a)
- Refutation
- B(g);
- Try
- Actual
- P(C);
- Threat
- P(C)
- Vars
- R(a);CHECK,N_GUARD::R1(G),XR(a)
- P(e);SBLOCK::R(K)+S(J),DCHECK
- P(e);SBLOCK::B(A)+S(D),DCHECK
- R(a);N_GUARD::R1(G)
- B(g);S_CUTR(a)::R1(G)
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).