MESON Chess Problem Database
Problem Display
PID: 243805 (K1R1Q3/5n1B/p2pN1N1/b1Bk4/7R/6pb/3rP3/4r3 w - - 0 1)
Petterson, Karl-Gunnar
Tidskrift for Schack, 1981
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Ra2
- 2.Rd4#
- 1...Rb2
- 2.Rd4#
- 1...Rc2
- 2.Rd4#
- 1...Rxe2
- 2.Rd4#
- 1...Rd4
- 2.Rxd4#
- 1...Bxe6
- 2.Qc6#
- 1...dxc5
- 2.Qc6#
- 1...Ra2
- Tries
- 1.Sd8?
- threat
- 2.Qc6#
- 2.Qe4#
- 1...Rexe2
- 2.Qc6#
- 1...Rdxe2
- 2.Rd4#
- 2.Qc6#
- 1...Bxc8
- 2.Qc6#
- 1...Bxd8
- 2.Qe4#
- 1...Sxd8
- 2.Qe4#
- 1...dxc5
- 2.Qc6#
- 1...Rd4
- 2.Rxd4#
- 1...Bc7
- 2.Qc6#
- 1...Bg2
- 2.Qc6#
- 2.Qxf7#
- 2.Qe6#
- 1...Bf5
- 2.Qc6#
- 1...Be6
- 2.Qc6#
- 2.Qxe6#
- 1...Bd7
- 2.Qe4#
- 1...Se5
- 2.Se7#
- 1...Sg5
- 2.Qc6#
- 1...Bg4!
- threat
- 1.Bf2?
- threat
- 2.Sef4#
- 1...Bxe6
- 2.Qc6#
- 1...Rd4
- 2.Rxd4#
- 1...Bc7
- 2.Sxc7#
- 1...Se5
- 2.Sgf4#
- 1...gxf2!
- threat
- 1.Be3?
- threat
- 2.Sef4#
- 1...Bxe6
- 2.Qc6#
- 1...Rd4
- 2.Rxd4#
- 1...Bc7
- 2.Sxc7#
- 1...Se5
- 2.Sgf4#
- 1...Rf1!
- threat
- 1.Bb6?
- threat
- 2.Sef4#
- 2.Sc7#
- 1...Bxe6
- 2.Qc6#
- 1...Bg4
- 2.Sef4#
- 1...Rc1
- 2.Sef4#
- 2.e4#
- 1...Rf1
- 2.Sc7#
- 2.e4#
- 1...Rc2
- 2.Sef4#
- 2.Rd4#
- 1...Rd4
- 2.Rxd4#
- 1...Se5
- 2.Sc7#
- 2.Sgf4#
- 1...Bxb6!
- threat
- 1.Ba7?
- threat
- 2.Sef4#
- 1...Bxe6
- 2.Qc6#
- 1...Rf1
- 2.e4#
- 1...Rd4
- 2.Rxd4#
- 1...Bc7
- 2.Sxc7#
- 1...Se5
- 2.Sgf4#
- 1...Bb6!
- threat
- 1.Re4?
- threat
- 2.Sef4#
- 2.Sgf4#
- 2.Se7#
- 2.Qc6#
- 1...Bxe6
- 2.Sf4#
- 2.Se7#
- 2.Qc6#
- 2.Qxe6#
- 1...dxc5
- 2.Qc6#
- 1...Rd4
- 2.Rxd4#
- 1...Bc7
- 2.Sgf4#
- 2.Se7#
- 1...Rf1
- 2.Se7#
- 2.Qc6#
- 1...Bf5
- 2.Sef4#
- 2.Qc6#
- 1...Bd8
- 2.Sef4#
- 2.Sgf4#
- 2.Qc6#
- 1...Se5
- 2.Sgf4#
- 1...Sd8
- 2.Sef4#
- 2.Sgf4#
- 2.Se7#
- 1...Kxe4!
- threat
- 1.Sd8?
- Keys
- 1.Bg1!
- threat
- 2.Sef4#
- 1...Rxg1
- 2.e4#
- 1...Bxe6
- 2.Qc6#
- 1...Rf1
- 2.e4#
- 1...Rd4
- 2.Rxd4#
- 1...Bc7
- 2.Sxc7#
- 1...Se5
- 2.Sgf4#
- threat
- 1.Bg1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- R(b);N_GUARD::R1(B)
- R(b);N_GUARD,XP(A)::R1(B)
- R(b);N_GUARD::R1(B),XR(b)
- B(d);SBLOCK,XS(D)::QAB1(I)
- P(h);XB(C)::QAB1(I)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(a);XP(A)::QAB1(I)
- B(d);XR(H)::QAB1(I)
- B(e);XS(D)::QAB1(I)
- S(i);XS(D)::QAB1(I)
- P(h);XB(C)::QAB1(I)
- R(b);N_GUARD::R1(B),XR(b)
- B(e);::QAB1(I)
- B(d);::QAB1(I)
- S(i);SBLOCK::S(E)
- S(i);::QAB1(I)
- Refutation
- B(d);
- Try
- B(C);
- Threat
- S(D)
- Vars
- B(d);SBLOCK,XS(D)::QAB1(I)
- R(b);N_GUARD::R1(B),XR(b)
- B(e);N_GUARD::S(D),XB(e)
- S(i);SBLOCK::S(E)
- Refutation
- P(c);XB(C)
- Try
- B(C);
- Threat
- S(D)
- Vars
- B(d);SBLOCK,XS(D)::QAB1(I)
- R(b);N_GUARD::R1(B),XR(b)
- B(e);N_GUARD::S(D),XB(e)
- S(i);SBLOCK::S(E)
- Refutation
- R(a);
- Try
- B(C);
- Threat
- DUALS(2)
- Vars
- B(d);SBLOCK,XS(D)::QAB1(I)
- B(d);::S(D)
- R(b);N_GUARD::R1(B),XR(b)
- Refutation
- B(e);XB(C)
- Try
- B(C);
- Threat
- S(D)
- Vars
- B(d);SBLOCK,XS(D)::QAB1(I)
- R(a);N_GUARD::P(A)
- R(b);N_GUARD::R1(B),XR(b)
- B(e);N_GUARD::S(D),XB(e)
- S(i);SBLOCK::S(E)
- Refutation
- B(e);
- Try
- R(B);
- Threat
- DUALS(4)
- Vars
- P(h);XB(C)::QAB1(I)
- R(b);N_GUARD::R1(B),XR(b)
- S(i);::S(E)
- Refutation
- K(f);S_FLIGHT,XR(B)
- Try
- Actual
- B(C);
- Threat
- S(D)
- Vars
- R(a);N_GUARD,XB(C)::P(A)
- B(d);SBLOCK,XS(D)::QAB1(I)
- R(a);N_GUARD::P(A)
- R(b);N_GUARD::R1(B),XR(b)
- B(e);N_GUARD::S(D),XB(e)
- S(i);SBLOCK::S(E)
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