MESON Chess Problem Database
Problem Display
PID: 239892 (B1bR4/1r3N2/7N/3nB3/1p2k3/pR2p1P1/3b4/3Q3K w - - 0 1)
Ellerman, Arnoldo
Parallele 50, 1947
#2
9 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rb6
- 2.Bxd5#
- 1...Ra7
- 2.Bxd5#
- 1...Rc7
- 2.Bxd5#
- 1...Rd7
- 2.Qg4#
- 1...Re7
- 2.Bxd5#
- 1...Rb8
- 2.Bxd5#
- 1...Bc1
- 2.Qxd5#
- 1...Be1
- 2.Qxd5#
- 1...Bc3
- 2.Qxd5#
- 1...Sc3
- 2.Rxb4#
- 2.Rd4#
- 1...Sf4
- 2.Rd4#
- 1...Sb6
- 2.Rd4#
- 1...Sf6
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Se7
- 2.Rd4#
- 1...e2
- 2.Qc2#
- 2.Qb1#
- 1...Rb6
- Tries
- 1.Bb2?
- threat
- 2.Sg5#
- 2.Sd6#
- 1...Rxf7
- 2.Bxd5#
- 1...Rb6
- 2.Sg5#
- 2.Bxd5#
- 1...Rd7
- 2.Sg5#
- 2.Qg4#
- 1...Bc3
- 2.Qxd5#
- 1...Sc3
- 2.Rxb4#
- 1...Sf4
- 2.Sg5#
- 2.Rd4#
- 1...Sb6
- 2.Sg5#
- 2.Rd4#
- 1...Sf6
- 2.Sg5#
- 2.Rd4#
- 1...Sc7
- 2.Sg5#
- 2.Rd4#
- 1...Se7
- 2.Sg5#
- 2.Rd4#
- 1...e2
- 2.Sd6#
- 2.Qc2#
- 2.Qb1#
- 1...axb2!
- threat
- 1.Bf6?
- threat
- 2.Sg5#
- 2.Sd6#
- 1...Rxf7
- 2.Bxd5#
- 1...Rb6
- 2.Sg5#
- 2.Bxd5#
- 1...Rd7
- 2.Sg5#
- 2.Qg4#
- 1...Sc3
- 2.Sg5#
- 2.Rxb4#
- 2.Rd4#
- 1...Sf4
- 2.Sg5#
- 2.Rd4#
- 1...Sb6
- 2.Sg5#
- 2.Rd4#
- 1...Sc7
- 2.Sg5#
- 2.Rd4#
- 1...Se7
- 2.Sg5#
- 2.Rd4#
- 1...e2
- 2.Sd6#
- 2.Qc2#
- 2.Qb1#
- 1...Sxf6!
- threat
- 1.Bg7?
- threat
- 2.Sg5#
- 2.Sd6#
- 1...Rxf7
- 2.Bxd5#
- 1...Rb6
- 2.Sg5#
- 2.Bxd5#
- 1...Rd7
- 2.Sg5#
- 2.Qg4#
- 1...Sc3
- 2.Sg5#
- 2.Rxb4#
- 2.Rd4#
- 1...Sf4
- 2.Sg5#
- 2.Rd4#
- 1...Sb6
- 2.Sg5#
- 2.Rd4#
- 1...Sc7
- 2.Sg5#
- 2.Rd4#
- 1...Se7
- 2.Sg5#
- 2.Rd4#
- 1...e2
- 2.Sd6#
- 2.Qc2#
- 2.Qb1#
- 1...Sf6!
- threat
- 1.Bh8?
- threat
- 2.Sg5#
- 2.Sd6#
- 1...Rxf7
- 2.Bxd5#
- 1...Rb6
- 2.Sg5#
- 2.Bxd5#
- 1...Rd7
- 2.Sg5#
- 2.Qg4#
- 1...Sc3
- 2.Sg5#
- 2.Rxb4#
- 2.Rd4#
- 1...Sf4
- 2.Sg5#
- 2.Rd4#
- 1...Sb6
- 2.Sg5#
- 2.Rd4#
- 1...Sc7
- 2.Sg5#
- 2.Rd4#
- 1...Se7
- 2.Sg5#
- 2.Rd4#
- 1...e2
- 2.Sd6#
- 2.Qc2#
- 2.Qb1#
- 1...Sf6!
- threat
- 1.Rxe3+?
- 1...Bxe3
- 2.Qxd5#
- 1...Sxe3
- 2.Rd4#
- 1...Kxe3!
- 1...Bxe3
- 1.Rxb4+?
- 1...Kd3
- 2.Rxd5#
- 1...Bxb4
- 2.Qxd5#
- 1...Sxb4
- 2.Rd4#
- 1...Rxb4!
- 1...Kd3
- 1.Qg4+?
- 1...Sf4
- 2.Rd4#
- 2.Qxf4#
- 1...Bxg4!
- 1...Sf4
- 1.Qxd2?
- threat
- 2.Qg2#
- 2.Qxd5#
- 1...Kf3
- 2.Sg5#
- 2.Qg2#
- 1...Rxf7
- 2.Rxe3#
- 2.Qxe3#
- 2.Qxd5#
- 1...Rb5
- 2.Rxe3#
- 2.Qxe3#
- 2.Qg2#
- 1...Rd7
- 2.Rxe3#
- 2.Qxe3#
- 2.Qg2#
- 1...Bh3
- 2.Qxd5#
- 1...Bg4
- 2.Qxd5#
- 1...Be6
- 2.Qg2#
- 1...Bd7
- 2.Qg2#
- 1...Sc3
- 2.Qg2#
- 1...Sf4
- 2.Rxe3#
- 2.Qxe3#
- 1...Sb6
- 2.Rxe3#
- 2.Qxe3#
- 2.Qg2#
- 1...Sf6
- 2.Rxe3#
- 2.Qxe3#
- 2.Qg2#
- 1...Sc7
- 2.Rxe3#
- 2.Qxe3#
- 2.Qg2#
- 1...Se7
- 2.Rxe3#
- 2.Qxe3#
- 2.Qg2#
- 1...e2
- 2.Qc2#
- 2.Qd3#
- 2.Qd4#
- 2.Qxd5#
- 1...exd2!
- threat
- 1.Bb2?
- Keys
- 1.Ba1!
- threat
- 2.Sg5#
- 2.Sd6#
- 1...Rxf7
- 2.Bxd5#
- 1...Rb6
- 2.Sg5#
- 2.Bxd5#
- 1...Rd7
- 2.Sg5#
- 2.Qg4#
- 1...Bc3
- 2.Qxd5#
- 1...Sc3
- 2.Rxb4#
- 1...Sf4
- 2.Sg5#
- 2.Rd4#
- 1...Sb6
- 2.Sg5#
- 2.Rd4#
- 1...Sf6
- 2.Sg5#
- 2.Rd4#
- 1...Sc7
- 2.Sg5#
- 2.Rd4#
- 1...Se7
- 2.Sg5#
- 2.Rd4#
- 1...e2
- 2.Sd6#
- 2.Qc2#
- 2.Qb1#
- threat
- 1.Ba1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 13
- Sets
- R(g);OGATE,P_SPINS(f)::B(H),XS(f)
- R(g);P_SPINS(f),S_CUTB(h)::QAR2(A)
- B(a);OGATE::QAB1(A),XS(f)
- S(f);OGATE,P_SPINR(g)::R1(I)
- Tries
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- R(g);OGATE,P_SPINS(f),XS(G)::B(H),XS(f)
- B(a);OGATE::QAB1(A),XS(f)
- S(f);N_GUARD,P_SPINR(g),S_CUTB(a)::R(C),XP(d)
- Refutation
- P(b);XB(E)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- R(g);OGATE,P_SPINS(f),XS(G)::B(H),XS(f)
- Refutation
- S(f);P_SPINR(g),XB(E)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- R(g);OGATE,P_SPINS(f),XS(G)::B(H),XS(f)
- Refutation
- S(f);P_SPINR(g)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- R(g);OGATE,P_SPINS(f),XS(G)::B(H),XS(f)
- Refutation
- S(f);P_SPINR(g)
- Try
- R(C);CHECK,XP(c)
- Vars
- B(a);OGATE,SBLOCK,XR(C)::QAB1(A),XS(f)
- S(f);OGATE,P_SPINR(g),SBLOCK,XR(C)::R1(I)
- Refutation
- K(e);P-FLIGHT,XR(C)
- Try
- R(C);CHECK,XP(d)
- Vars
- K(e);P_SPINB(a),P_SPINS(f),S_FLIGHT::R(I),XS(f)
- B(a);OGATE,XR(C)::QAB1(A),XS(f)
- S(f);OGATE,P_SPINR(g),XR(C)::R1(I)
- Refutation
- R(g);P_SPINS(f),XR(C)
- Try
- Q(A);CHECK
- Refutation
- B(h);XQ(A)
- Try
- Q(A);XB(a)
- Threat
- DUALS(2)
- Vars
- B(h);::QAB1(A),XS(f)
- B(h);::QAB(A)
- S(f);P_SPINR(g)::QAB(A)
- Refutation
- P(c);XQ(A)
- Try
- Actual
- B(E);
- Threat
- DUALS(2)
- Vars
- R(g);OGATE,P_SPINS(f),XS(G)::B(H),XS(f)
- B(a);OGATE::QAB1(A),XS(f)
- S(f);N_GUARD,P_SPINR(g),S_CUTB(a)::R(C),XP(d)
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).