MESON Chess Problem Database

Problem Display
PID: 264179 (3nQ1K1/r5p1/2pB1p2/2Pk2N1/3NRr2/p7/2p5/1nq1bB2 w - - 0 1)

Hermanson, Halvar

Tijdschrift vd KNSB, 1952

3nQ1K1/r5p1/2pB1p2/2Pk2N1/3NRr2/p7/2p5/1nq1bB2

#2

8 + 12

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Qxe4#
    • 1...Se6
      • 2.Qxc6#
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qxc6#
      • 2.Qf7#
      • 2.Qe6#
    • 1...Sf7
      • 2.Qxc6#
      • 2.Qe6#
    • 1...fxg5
      • 2.Qe5#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Bc4#
      • 1...Rxf1
        • 2.Rd4#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Ra4
        • 2.Sc7#
      • 1...Sd2
        • 2.Sc3#
      • 1...cxb5!
    • 1.Sxc6?
      • threat
        • 2.Bc4#
      • 1...Rxf1
        • 2.Rd4#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Ra4
        • 2.Se7#
      • 1...Sd2
        • 2.Sb4#
      • 1...Rd7!
    • 1.Sde6?
      • threat
        • 2.Bc4#
      • 1...Rxf1
        • 2.Rd4#
      • 1...fxg5
        • 2.Re5#
      • 1...Ra4
        • 2.Sc7#
      • 1...Sd2
        • 2.Sxf4#
      • 1...Rxe4!
    • 1.Re5+?
      • 1...fxe5
        • 2.Qxe5#
      • 1...Kxd4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Bc4#
      • 1...Rxf1
        • 2.Rd4#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Ra4
        • 2.Se7#
      • 1...Sd2
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(f);OGATE,XR(C)::QAB1(G),XR(f)
    • P(i);N_GUARD,XS(E)::QAR1(G)
    • P(i);N_GUARD::QAR1(G)
  • Tries
    • Try
      • S(B);
      • Threat
        • B(A)
      • Vars
        • R(f);N_GUARD,XB(A)::R1(C)
        • R(f);OGATE,XR(C)::QAB1(G),XR(f)
        • R(j);N_GUARD::S(B)
        • S(a);N_GUARD,S_CUTB(c)::S(B)
      • Refutation
        • P(h);XS(B)
    • Try
      • S(B);XP(h)
      • Threat
        • B(A)
      • Vars
        • R(f);N_GUARD,XB(A)::R1(C)
        • R(f);OGATE,XR(C)::QAB1(G),XR(f)
        • R(j);N_GUARD::S(B)
        • S(a);S_CUTB(c)::S(B)
      • Refutation
        • R(j);
    • Try
      • S(B);
      • Threat
        • B(A)
      • Vars
        • R(f);N_GUARD,XB(A)::R1(C)
        • P(i);N_GUARD,XS(E)::R1(C)
        • R(j);N_GUARD::S(B)
        • S(a);S_CUTQ(b)::S(B),XR(f)
      • Refutation
        • R(f);XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • P(i);OGATE,XR(C)::QAR1(G),XP(i)
      • Refutation
        • K(g);P-FLIGHT,XS(B)
  • Actual
    • S(B);
    • Threat
      • B(A)
    • Vars
      • R(f);N_GUARD,XB(A)::R1(C)
      • R(f);OGATE,XR(C)::QAB1(G),XR(f)
      • R(j);N_GUARD::S(B)
      • S(a);S_CUTQ(b)::S(B)
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