MESON Chess Problem Database

Problem Display
PID: 194138 (K6b/8/2p5/5b2/R7/2kN2Q1/1R6/3r4 w - - 0 1)

Ernst, Georg

Deutsches Wochenschach, 1917

K6b/8/2p5/5b2/R7/2kN2Q1/1R6/3r4

#2

5 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Sf2+?
      • 1...Rd3
        • 2.Sd1#
      • 1...Bd3
        • 2.Sxd1#
      • 1...Kxb2!
    • 1.Qe1+?
      • 1...Kxd3
        • 2.Qg3#
      • 1...Rd2
        • 2.Qxd2#
      • 1...Rxe1!
    • 1.Qf2?
      • threat
        • 2.Qc2#
      • 1...Kxd3
        • 2.Qg3#
        • 2.Qf3#
      • 1...Rc1
        • 2.Qd2#
      • 1...Rd2
        • 2.Qxd2#
      • 1...Bxd3!
    • 1.Qe5+?
      • 1...Kxd3
        • 2.Qg3#
      • 1...Bxe5!
    • 1.Qb8?
      • threat
        • 2.Qb3#
      • 1...Kxd3
        • 2.Qg3#
      • 1...Be6!
    • 1.Qg2?
      • threat
        • 2.Qc2#
      • 1...Kxd3
        • 2.Qf3#
        • 2.Qg3#
      • 1...Rc1
        • 2.Qd2#
      • 1...Rd2
        • 2.Qxd2#
      • 1...Bxd3!
    • 1.Qg7+?
      • 1...Kxd3
        • 2.Qg3#
      • 1...Bxg7!
    • 1.Qg8?
      • threat
        • 2.Qb3#
        • 2.Qc4#
      • 1...Kxd3
        • 2.Qg3#
      • 1...Rxd3
        • 2.Qb3#
      • 1...Bxd3
        • 2.Qb3#
        • 2.Qxh8#
      • 1...Be6!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qc2#
      • 1...Kxd3
        • 2.Qg3#
      • 1...Bxd3
        • 2.Qxh8#
      • 1...Rc1
        • 2.Qd2#
      • 1...Rd2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(a);P_SPINR(a)::S(B)
        • B(c);P_SPINB(c)::S(B),XR(a)
      • Refutation
        • K(b);S_FLIGHT,XR(A)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XS(B)::QAR(C)
        • R(a);N_GUARD,P_SPINR(a)::QAB1(C),XR(a)
      • Refutation
        • R(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(a);N_GUARD::QAB1(C)
        • R(a);N_GUARD::QAB1(C),XR(a)
      • Refutation
        • B(c);XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XS(B)::QAR(C)
      • Refutation
        • B(e);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XS(B)::QAR(C)
      • Refutation
        • B(c);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(a);N_GUARD::QAB1(C)
        • R(a);N_GUARD::QAB1(C),XR(a)
      • Refutation
        • B(c);XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XS(B)::QAR(C)
      • Refutation
        • B(e);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XS(B)::QAR(C)
        • R(a);SBLOCK,XS(B)::QAR1(C)
      • Refutation
        • B(c);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XS(B)::QAR(C)
      • B(c);SBLOCK,XS(B)::QAB(C),XB(e)
      • R(a);N_GUARD::QAB1(C)
      • R(a);N_GUARD::QAB1(C),XR(a)
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