MESON Chess Problem Database
Problem Display
PID: 45589 (4bQ2/B2Rn1r1/2p1R3/3nb3/6p1/1Kp3pq/2B5/k7 w - - 0 1)
Karlstrom, Alfred Olaf
4th Comm., BCF 054. Ty., 1946-1947
#2
6 + 11
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Qxf1#
- 1...Qh2
- 2.Qf1#
- 1...Qh4
- 2.Qf1#
- 1...Qh5
- 2.Qf1#
- 1...Qh7
- 2.Qf1#
- 1...Qh8
- 2.Qf1#
- 1...Bd4
- 2.Re1#
- 1...Bd6
- 2.Re1#
- 1...Bf6
- 2.Re1#
- 1...Bc7
- 2.Re1#
- 1...Bb8
- 2.Re1#
- 1...Sb4
- 2.Rd1#
- 1...Sf4
- 2.Rd1#
- 1...Sb6
- 2.Rd1#
- 1...Sf6
- 2.Rd1#
- 1...Sc7
- 2.Rd1#
- 1...Sf5
- 2.Qa3#
- 1...Sg6
- 2.Qa3#
- 1...Sc8
- 2.Qa3#
- 1...Sg8
- 2.Qa3#
- 1...c5
- 2.Ra6#
- 1...Qf1
- Tries
- 1.Bf2?
- threat
- 2.Ra7#
- 1...Bxd7
- 2.Qa8#
- 1...Bd4
- 2.Re1#
- 1...Bd6
- 2.Re1#
- 1...Bc7
- 2.Re1#
- 1...Bb8
- 2.Re1#
- 1...Sb4
- 2.Rd1#
- 1...Sb6
- 2.Rd1#
- 1...Sc7
- 2.Rd1#
- 1...Sf5
- 2.Qa3#
- 1...Sg6
- 2.Qa3#
- 1...Sc8
- 2.Qa3#
- 1...Sg8
- 2.Qa3#
- 1...c5
- 2.Ra6#
- 1...Qf1!
- threat
- 1.Bb6?
- threat
- 2.Ra7#
- 1...Bxd7
- 2.Qa8#
- 1...Sxb6
- 2.Rd1#
- 1...Qf1
- 2.Qxf1#
- 1...Bd6
- 2.Re1#
- 1...Bc7
- 2.Re1#
- 1...Bb8
- 2.Re1#
- 1...Sb4
- 2.Rd1#
- 1...Sc7
- 2.Rd1#
- 1...Sf5
- 2.Qa3#
- 1...Sg6
- 2.Qa3#
- 1...Sc8
- 2.Qa3#
- 1...Sg8
- 2.Qa3#
- 1...c5!
- threat
- 1.Bb8?
- threat
- 2.Ra7#
- 1...Bxb8
- 2.Re1#
- 1...Qf1
- 2.Qxf1#
- 1...Bd4
- 2.Re1#
- 1...Bd6
- 2.Re1#
- 1...Bc7
- 2.Re1#
- 1...Sb4
- 2.Rd1#
- 1...Sb6
- 2.Rd1#
- 1...Sc7
- 2.Rd1#
- 1...Sf5
- 2.Qa3#
- 1...Sg6
- 2.Qa3#
- 1...Sc8
- 2.Qa3#
- 1...Sg8
- 2.Qa3#
- 1...c5
- 2.Ra6#
- 1...Bxd7!
- threat
- 1.Rxd5?
- threat
- 2.Rd1#
- 2.Ra5#
- 1...Sxd5
- 2.Qa3#
- 1...Qh6
- 2.Ra5#
- 1...Qf1
- 2.Ra5#
- 2.Qxf1#
- 1...Qh1
- 2.Ra5#
- 1...Bd4
- 2.Ra5#
- 2.Re1#
- 1...Bf4
- 2.Ra5#
- 1...Bd6
- 2.Rd1#
- 2.Re1#
- 1...Bc7
- 2.Rd1#
- 2.Re1#
- 1...c5
- 2.Rd1#
- 1...cxd5!
- threat
- 1.Qxe7?
- threat
- 2.Qa3#
- 1...Sxe7
- 2.Rd1#
- 1...Bd6
- 2.Re1#
- 1...Sb4
- 2.Rd1#
- 1...c5
- 2.Ra6#
- 1...Rxe7!
- threat
- 1.Qf4?
- threat
- 2.Qc1#
- 2.Qa4#
- 1...Sxf4
- 2.Rd1#
- 1...Qh6
- 2.Qa4#
- 1...Qf1
- 2.Qxf1#
- 2.Qa4#
- 1...Qh1
- 2.Qa4#
- 1...Bd4
- 2.Re1#
- 2.Qc1#
- 1...Bd6
- 2.Re1#
- 2.Qc1#
- 1...Se3
- 2.Qa4#
- 1...Sb4
- 2.Rd1#
- 2.Qc1#
- 1...Sb6
- 2.Rd1#
- 2.Qc1#
- 1...Bxf4!
- threat
- 1.Bf2?
- Keys
- 1.Bg1!
- threat
- 2.Ra7#
- 1...Bxd7
- 2.Qa8#
- 1...Qf1
- 2.Qxf1#
- 1...Bd4
- 2.Re1#
- 1...Bd6
- 2.Re1#
- 1...Bc7
- 2.Re1#
- 1...Bb8
- 2.Re1#
- 1...Sb4
- 2.Rd1#
- 1...Sb6
- 2.Rd1#
- 1...Sc7
- 2.Rd1#
- 1...Sf5
- 2.Qa3#
- 1...Sg6
- 2.Qa3#
- 1...Sc8
- 2.Qa3#
- 1...Sg8
- 2.Qa3#
- 1...c5
- 2.Ra6#
- threat
- 1.Bg1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- Q(d);N_GUARD::QAR(F),XQ(d)
- Q(d);N_GUARD::QAR(F)
- B(g);OGATE::R(C)
- S(f);OGATE::R(E)
- S(i);OGATE::QAR2(F)
- P(h);OGATE::R(C)
- Tries
- Try
- B(D);
- Threat
- R(E)
- Vars
- B(k);OGATE,XR(E)::QAB(F)
- B(g);OGATE::R(C)
- S(f);OGATE::R(E)
- S(i);OGATE::QAR2(F)
- P(h);OGATE::R(C)
- Refutation
- Q(d);
- Try
- B(D);
- Threat
- R(E)
- Vars
- B(k);OGATE,XR(E)::QAB(F)
- S(f);OGATE,XB(D)::R(E)
- Q(d);N_GUARD::QAR(F),XQ(d)
- B(g);OGATE::R(C)
- S(f);OGATE::R(E)
- S(i);OGATE::QAR2(F)
- Refutation
- P(h);
- Try
- B(D);
- Threat
- R(E)
- Vars
- B(g);OGATE,XB(D)::R(C)
- Q(d);N_GUARD::QAR(F),XQ(d)
- B(g);OGATE::R(C)
- S(f);OGATE::R(E)
- S(i);OGATE::QAR2(F)
- P(h);OGATE::R(C)
- Refutation
- B(k);XR(E)
- Try
- R(E);XS(f)
- Threat
- DUALS(2)
- Vars
- S(i);OGATE,XR(E)::QAR2(F)
- Q(d);::R(E)
- Q(d);SBLOCK::R(E)
- B(g);::R(E)
- P(h);::R(E)
- Refutation
- P(h);XR(E)
- Try
- Q(F);XS(i)
- Threat
- QAR2(F)
- Vars
- S(f);OGATE,XQ(F)::R(E)
- B(g);OGATE::R(C)
- S(f);OGATE::R(E)
- P(h);OGATE::R(C)
- Refutation
- R(j);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- S(f);OGATE,XQ(F)::R(E)
- Q(d);::QAR(F)
- Q(d);SBLOCK::QAR(F)
- S(f);::QAR(F)
- Refutation
- B(g);XQ(F)
- Try
- Actual
- B(D);
- Threat
- R(E)
- Vars
- B(k);OGATE,XR(E)::QAB(F)
- Q(d);N_GUARD::QAR(F),XQ(d)
- B(g);OGATE::R(C)
- S(f);OGATE::R(E)
- S(i);OGATE::QAR2(F)
- P(h);OGATE::R(C)
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