MESON Chess Problem Database
Problem Display
PID: 197795 (4Rb2/2pr1n2/6Rp/1p1kN3/1P2p3/2P5/1N1rb3/KB4Q1 w - - 0 1)
Racz, Erich
Die Schwalbe, 1974
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxb2
- 2.Qd4#
- 1...Rc2
- 2.Qd4#
- 1...Rd3
- 2.Ba2#
- 1...Rd4
- 2.Qxd4#
- 1...Rd6
- 2.Qc5#
- 1...Re7
- 2.Qc5#
- 1...Bd3
- 2.Qd4#
- 1...Bf3
- 2.Ba2#
- 1...Bg4
- 2.Ba2#
- 1...Bh5
- 2.Ba2#
- 1...Bc5
- 2.Qxc5#
- 1...Bg7
- 2.Qc5#
- 1...Sd6
- 2.Qc5#
- 1...Rxb2
- Tries
- 1.Sed3?
- threat
- 2.Sf4#
- 2.Ba2#
- 2.Qd4#
- 1...Rxb2
- 2.Qd4#
- 1...Rxd3
- 2.Ba2#
- 1...Bxd3
- 2.Qd4#
- 1...exd3
- 2.Ba2#
- 2.Qd4#
- 1...Rd6
- 2.Qc5#
- 1...Sd6
- 2.Qc5#
- 1...Rd1
- 2.Sf4#
- 2.Qd4#
- 1...Re7
- 2.Ba2#
- 2.Qd4#
- 2.Qc5#
- 1...Bd1
- 2.Sf4#
- 2.Qd4#
- 1...Bc5
- 2.Sf4#
- 2.Ba2#
- 2.Qxc5#
- 1...Be7
- 2.Ba2#
- 2.Qd4#
- 1...Bg7
- 2.Sf4#
- 2.Ba2#
- 2.Qc5#
- 1...Se5
- 2.Sf4#
- 2.Rxe5#
- 2.Qd4#
- 1...e3
- 2.Sf4#
- 2.Ba2#
- 1...c5
- 2.Sf4#
- 1...Bd6!
- threat
- 1.Sg4?
- threat
- 2.Se3#
- 2.Bxe4#
- 1...Rxb2
- 2.Se3#
- 2.Qd4#
- 1...Bxg4
- 2.Ba2#
- 2.Bxe4#
- 1...Bxb4
- 2.Bxe4#
- 1...Rd6
- 2.Bxe4#
- 2.Qc5#
- 1...Bd6
- 2.Bxe4#
- 1...Sd6
- 2.Qc5#
- 1...Rd1
- 2.Se3#
- 1...Rc2
- 2.Se3#
- 2.Qd4#
- 1...Rd3
- 2.Ba2#
- 1...Rd4
- 2.Se3#
- 2.Qxd4#
- 1...Re7
- 2.Qc5#
- 1...Bd3
- 2.Se3#
- 2.Qd4#
- 1...Bf3
- 2.Se3#
- 2.Ba2#
- 1...Bc5
- 2.Bxe4#
- 2.Qxc5#
- 1...Se5
- 2.Se3#
- 2.Rxe5#
- 1...Sg5
- 2.Se3#
- 2.Re5#
- 1...e3
- 2.Sxe3#
- 2.Be4#
- 1...Be7!
- threat
- 1.Sxf7?
- threat
- 2.Bxe4#
- 2.Re5#
- 1...Rxb2
- 2.Qd4#
- 1...Rxf7
- 2.Bxe4#
- 1...Rd6
- 2.Bxe4#
- 2.Qc5#
- 1...Bd6
- 2.Bxe4#
- 1...Rd1
- 2.Re5#
- 1...Rc2
- 2.Re5#
- 2.Qd4#
- 1...Rd3
- 2.Ba2#
- 2.Re5#
- 1...Rd4
- 2.Re5#
- 2.Qxd4#
- 1...Re7
- 2.Qc5#
- 1...Bd3
- 2.Re5#
- 2.Qd4#
- 1...Bf3
- 2.Ba2#
- 2.Re5#
- 1...Bg7
- 2.Bxe4#
- 2.Qc5#
- 1...e3
- 2.Be4#
- 2.Re5#
- 1...Be7!
- threat
- 1.Qe3?
- threat
- 2.Bxe4#
- 2.Qxe4#
- 1...Bxb4
- 2.Bxe4#
- 1...Re7
- 2.Qc5#
- 2.Qxe4#
- 1...Be7
- 2.Qxe4#
- 1...Rd1
- 2.Qxe4#
- 1...Rc2
- 2.Qd4#
- 1...Rd3
- 2.Ba2#
- 1...Rd4
- 2.Qxd4#
- 1...Bd3
- 2.Qd4#
- 1...Bf3
- 2.Ba2#
- 2.Qxd2#
- 1...Sd6
- 2.Qc5#
- 1...Sg5!
- threat
- 1.Sed3?
- Keys
- 1.Sbd3!
- threat
- 2.Sf4#
- 2.Qd4#
- 1...Ra2+
- 2.Bxa2#
- 1...Rxd3
- 2.Ba2#
- 1...Bxd3
- 2.Qd4#
- 1...Sxe5
- 2.Qd4#
- 1...exd3
- 2.Qd4#
- 1...e3
- 2.Sf4#
- 1...Re7
- 2.Qd4#
- 2.Qc5#
- 1...Bc5
- 2.Sf4#
- 2.Qxc5#
- 1...Be7
- 2.Qd4#
- 1...c5
- 2.Sf4#
- threat
- 1.Sbd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 11
- Sets
- R(a);N_GUARD,XS(D)::QAR1(C)
- R(a);N_GUARD::QAR1(C)
- R(a);S_CUTB(b)::B(B)
- R(a);N_GUARD::QAR1(C),XR(a)
- R(h);S_CUTB(j)::QAR1(C)
- B(b);S_CUTR(a)::QAR1(C)
- B(b);N_GUARD::B(B)
- B(j);N_GUARD::QAR1(C),XB(j)
- B(j);N_GUARD::QAR1(C)
- S(i);S_CUTB(j)::QAR1(C)
- Tries
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- R(a);XS(D)::QAR1(C)
- R(a);XS(G)::B(B)
- B(b);XS(G)::QAR1(C)
- R(h);S_CUTB(j)::QAR1(C)
- S(i);S_CUTB(j)::QAR1(C)
- P(g);::S(G)
- Refutation
- B(j);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(j);XP(F)::B(B),XP(c)
- B(j);::B(B),XP(c)
- S(i);S_CUTB(j)::QAR1(C)
- R(a);P_PINB(B)::S(G)
- R(a);S_CUTB(b)::B(B)
- R(h);S_CUTB(j)::QAR1(C)
- Refutation
- B(j);
- Try
- S(G);XS(i)
- Threat
- DUALS(2)
- Vars
- R(a);N_GUARD,XS(D)::QAR1(C)
- R(h);XS(G)::B(B),XP(c)
- B(j);::B(B),XP(c)
- R(a);P_PINB(B)::R1(I)
- R(h);S_CUTB(j)::QAR1(C)
- Refutation
- B(j);
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- B(j);XP(F)::B(B),XP(c)
- B(j);::QAB1(C),XP(c)
- R(a);P_PINB(B)::QAB1(C),XP(c)
- R(a);N_GUARD::QAR1(C)
- R(a);S_CUTB(b)::B(B)
- R(a);N_GUARD::QAR1(C),XR(a)
- B(b);S_CUTR(a)::QAR1(C)
- S(i);S_CUTB(j)::QAR1(C)
- Refutation
- S(i);
- Try
- Actual
- S(D);
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,N_GUARD::B(B),XR(a)
- R(a);N_GUARD,XS(D)::B(B)
- B(b);XS(D)::QAR1(C)
- S(i);XS(G)::QAR1(C)
- P(c);XS(D)::QAR1(C)
- P(c);::S(D)
- B(j);::QAR1(C)
- P(g);::S(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).