MESON Chess Problem Database

Problem Display
PID: 203585 (2R3B1/7Q/rr1p4/2NP1Kp1/P1k5/P5p1/1B1n4/7n w - - 0 1)

Lobel, Ernst

1st HM., Arbeiter Schachzeitung, 1924

2R3B1/7Q/rr1p4/2NP1Kp1/P1k5/P5p1/1B1n4/7n

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kg4?
      • threat
        • 2.Qc2#
        • 2.Qd3#
      • 1...Rxa4
        • 2.Qd3#
      • 1...Rxb2
        • 2.Qd3#
      • 1...dxc5
        • 2.Qc2#
        • 2.d6#
      • 1...Rc6
        • 2.Qc2#
      • 1...Rb3
        • 2.Sxa6#
      • 1...Sb1
        • 2.Qd3#
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf2+!
    • 1.Kxg5?
      • threat
        • 2.Qc2#
        • 2.Qd3#
      • 1...Se4+
        • 2.Qxe4#
      • 1...Rxa4
        • 2.Qd3#
      • 1...Rxb2
        • 2.Qd3#
      • 1...dxc5
        • 2.Qc2#
        • 2.d6#
      • 1...Rc6
        • 2.Qc2#
      • 1...Rb3
        • 2.Sxa6#
      • 1...Sf2
        • 2.Qc2#
      • 1...Sb1
        • 2.Qd3#
        • 2.Qe4#
        • 2.Qh4#
      • 1...Sf3+!
    • 1.Ke6?
      • threat
        • 2.Qc2#
        • 2.Qd3#
      • 1...Rxa4
        • 2.Qd3#
      • 1...Rxb2
        • 2.Qd3#
      • 1...Rc6
        • 2.Qc2#
      • 1...Rb3
        • 2.Sxa6#
      • 1...Sf2
        • 2.Qc2#
      • 1...Sb1
        • 2.Qd3#
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...dxc5+!
  • Keys
    • 1.Kf6!
      • threat
        • 2.Qc2#
        • 2.Qd3#
      • 1...Se4+
        • 2.Qxe4#
      • 1...dxc5+
        • 2.d6#
      • 1...Rxa4
        • 2.Qd3#
      • 1...Rxb2
        • 2.Qd3#
      • 1...Rc6
        • 2.Qc2#
      • 1...Rb3
        • 2.Sxa6#
      • 1...Sf2
        • 2.Qc2#
      • 1...Sb1
        • 2.Qd3#
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(f);XP(C)::QAB1(G)
        • R(g);XB(A)::QAB1(G)
        • R(g);::QAR2(G)
        • R(g);N_GUARD,SBLOCK::R(H)+S(D),XR(f)
        • S(b);N_GUARD::QAR2(G),XS(b)
      • Refutation
        • S(a);CHECK
    • Try
      • K(F);P-FLIGHT,XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);CHECK,N_GUARD::QAR2(G),XS(b)
        • R(f);XP(C)::QAB1(G)
        • R(g);XB(A)::QAB1(G)
        • R(g);::QAR2(G)
        • R(g);N_GUARD,SBLOCK::R(H)+S(D),XR(f)
        • S(a);::QAR2(G)
      • Refutation
        • S(b);CHECK
    • Try
      • K(F);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(f);XP(C)::QAB1(G)
        • R(g);XB(A)::QAB1(G)
        • R(g);::QAR2(G)
        • R(g);N_GUARD,SBLOCK::R(H)+S(D),XR(f)
        • S(a);::QAR2(G)
        • S(b);N_GUARD::QAR2(G),XS(b)
      • Refutation
        • P(h);CHECK,P_SPINP(h),XS(D)
  • Actual
    • K(F);P-FLIGHT
    • Threat
      • DUALS(2)
    • Vars
      • S(b);CHECK,N_GUARD::QAR2(G),XS(b)
      • P(h);CHECK,OGATE,P_SPINP(h),XS(D)::B(I)+P(E)
      • R(f);XP(C)::QAB1(G)
      • R(g);XB(A)::QAB1(G)
      • R(g);::QAR2(G)
      • R(g);N_GUARD,SBLOCK::R(H)+S(D),XR(f)
      • S(a);::QAR2(G)
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